Quoted in article "Mikael Harutyunyan: no one will involve army in political processes." panarmenian.net [February 23, 2008]
Quotes about duty
page 10

Speech https://www.youtube.com/watch?v=0pfEJaI2iS4 (7 February 2011)
2010s

During Speech at Passing Out Parade of Indian Military Academy A Soldier's Duty http://worldofdefense.blogspot.in/2011/05/soldiers-duty-field-marshal-sam.html

Out of My Life (London: Cassell, 1920), pp. 236-237
Retirement

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 97.

“When a house is on fire, the neighbors' duty is to put it out”
[TUNISIA: Neighbor's Duty, TIME, Monday, Dec. 02, 1957, 1, http://www.time.com/time/magazine/article/0,9171,825330-1,00.html, September 6, 2011]

"The War Is Over" http://web.cecs.pdx.edu/~trent/ochs/lyrics/war-is-over.html from Tape from California (1968)
Lyrics

The Bacon Resolutions http://www.msc.edu.ph/centennial/bacon.html (September 1, 1900).

Source: A Man of Law's Tale (1952), In London, p. 293

Press release, (8 July 2008) Barack Obama Should Defend Constitution, Lead Fight Against FISA, Says Bob Barr http://www.prnewswire.com/cgi-bin/stories.pl?ACCT=104&STORY=/www/story/07-08-2008/0004845380&EDATE=, PR Newswire (press release), 8 July 2008.
2000s, 2008

Observations on the Drawing Up of Laws (1774)

Speech to the Socialist League in Nottingham (6 July 1935), quoted in The Times (8 July 1935), p. 21.

Source: Education in the New Age (1954), p.50

Audio lectures, Dangers Inherent in Public Education (March 24, 1986)

Morarji Desai speaks about life and celibacy
Case of Edmonds and others (1821), 1 St. Tr. (N. S.) 899.

Letter from the commissioners (John Adams, Thomas Jefferson) to John Jay, 28 March 1786, in Thomas Jefferson Travels: Selected Writings, 1784-1789, by Anthony Brandt, pp. 104-105 http://books.google.com/books?id=SY_3VKP0SEkC&pg=PA104&dq=%22Ambassador+Answered%22
1780s
Context: We took the liberty to make some enquiries concerning the ground of their pretensions to make war upon nations who had done them no injury, and observed that we considered all mankind as our friends who had done us no wrong, nor had given us any provocation. The Ambassador [of Tripoli] answered us that it was founded on the Laws of their Prophet, that it was written in their Koran, that all nations who should not have acknowledged their authority were sinners, that it was their right and duty to make war upon them wherever they could be found, and to make slaves of all they could take as Prisoners, and that every Musselman who should be slain in battle was sure to go to Paradise.

The Internet in China (February 28, 2006)

Letter to Thomas Law (13 June 1814)
1810s

p. 183-184. Detailing the salvaging of U.S.S. S-51, an operation which King commanded.

1870s, Eighth State of the Union Address (1876)

“Liberty is a duty, not a right.”
Speech on the 5th anniversary of the Combat Leagues (24 March 1924) quoted in Ezra Pound and Italian Fascism (1991) by Tim Redman, p. 114.
1920s

"Veto of the Texas Seed Bill" (16 February 1887)

June 20, 1944. Quoted in "Mussolini: The Last 600 Days of Il Duce" - Page 131 - by Ray Moseley - History - 2004.

1920s, Freedom and its Obligations (1924)
Source: Heart of Ice A Triple Threat Novel with April Henry (Thomas Nelson), pp. 10, 11

Minister-no-more http://yanisvaroufakis.eu/2015/07/06/minister-no-more/ at yanisvaroufakis.eu, 2015/07/06; cited in: I shall wear the creditors’ loathing with pride http://www.theguardian.com/world/commentisfree/2015/jul/06/yanis-varoufakis-resignation-statement-creditors-loathing-with-pride, in: theguardian.com, 6 July 2015.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 318.

1860s, The Prayer of the Twenty Millions (1862)

Speech in Ottawa, Illinois http://www.bartleby.com/251/11.html (21 August 1858)
1850s
“[Functionalism is] a distinction between kinds of duties.”
Source: The Principles of Organization, 1947, p. 15

Letter to George Washington (24 April 1779)

Opening address to the Great Council of Chiefs meeting, 27 July 2005 (excerpts)

Argument Against the Writs of Assistance (1761)
“Poets, Critics, and Readers”, pp. 112–113
A Sad Heart at the Supermarket: Essays & Fables (1962)

Source: Dictionary of Burning Words of Brilliant Writers, P. 150.

We must rethink globalization, or Trumpism will prevail (16 November 2016)

Farewell letter to Fidel Castro (1965)

Source: The Social Problems of an Industrial Civilisation, 1945, p. 81-82
"The spirit of disobedience: an invitation to resistance"

As quoted in The Early Court of Queen Victoria http://www.archive.org/stream/earlycourtofquee00jerruoft/earlycourtofquee00jerruoft_djvu.txt (1912) by Clare Jerrold

Letter to his parents regarding World War II (April 25, 1941)

The Divorce of Catherine of Aragon http://books.google.com/books?id=Y1wLAAAAYAAJ&q="The+first+duty+of+an+historian+is+to+be+on+his+guard+against+his+own+sympathies+but+he+cannot+wholly+escape+their+influence"&pg=PA19#v=onepage (1891)

1860s, The Prayer of the Twenty Millions (1862)

The Washington Times. August 9, 1922. pg. 5. http://chroniclingamerica.loc.gov/lccn/sn84026749/1922-08-09/ed-1/seq-5/

Quoted in Salazar: Biographical Study - page 368; of Franco Nogueira - Published by Atlantis Publishing, 1977
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 124.

Source: A Man of Law's Tale (1952), At the Scottish bar, p. 132

Source: The Plot: The Secret Story of the Protocols of the Elders of Zion (10/2/2005), pp. 102-107

Quoted in "Utopia & Revolution: On the Origins of a Metaphor" by Melvin Jonah Lasky, pg 53. Transaction Publishers, 1976
Attributed
Fragment 16 "What is the best provision for old age," in Moral Exhortation (1986), p. 32
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 389.

Source: The Martyrdom of Man (1872), Chapter IV, "Intellect", p. 540.

Source: The Priestly Kingdom (1984), p. 135

Die Pflicht der Kantianer verhält sich zu dem Gebot der Ehre, der Stimme des Berufs und der Gottheit in uns, wie die getrocknete Pflanze zur frischen Blume am lebenden Stamme.
“Ideas,” Lucinde and the Fragments, P. Firchow, trans. (1991), § 39

Quoted in "Commandant of Auschwitz" (1951)

Speech http://hansard.millbanksystems.com/commons/1834/mar/21/free-trade-liverpool-petition-adjourned in the House of Commons on a petition in favour of free trade (21 March 1834).

Source: Precepts and Judgments (1919), p. 83

Anarchism: Its Philosophy and Ideal (1896)

1840s, Past and Present (1843)

Off we all went to see Germany. In: LIFE Magazine, Vol. 19, No. 6, August 6, 1945, S.56, ISSN 0024-3019. google books https://books.google.at/books?id=0EkEAAAAMBAJ&pg=PA54&lpg=PA54&dq=%22gertrude+stein%22+%22off+we+all+went%22&source=bl&ots=xOi2_KGtgA&sig=rCjhy5aEb48I1LiWrDQNNVtw37c&hl=de&sa=X&ved=2ahUKEwij1sqZr7_cAhUFdcAKHQQhB_sQ6AEwAHoECAAQAQ#v=onepage&q=%22gertrude%20stein%22%20%22off%20we%20all%20went%22&f=false

Exhortation http://www.mennosimons.net/ft016-exhortation.html

Quote, c. 1850's; describing Turner's perspective lectures; as quoted in The life of J.M.W. Turner, Volume II, George Walter Thornbury; Hurst and Blackett Publishers, London, 1862, p. 108

2002-10-30
The O'Reilly Factor
Fox News
Television
to atheist Eagle Scout Darrel Lambert

Source: Seth, Dreams & Projections of Consciousness, (1986), p. 1

Prabhati Mukherjee in:"Hindu Women: Normative Models", p. 49.

As quoted in The Life Of Lord Courtney (1920) by G. P. Gooch
The statement "The price of peace is eternal vigilance" has been widely attributed to others, including George Marshall, however even Courtney's use of it is probably derived from an earlier statement with several variants:
The price of freedom is eternal vigilance.
The price of liberty is eternal vigilance.
Eternal vigilance is the price of liberty.

28 February 2018 tweet https://twitter.com/andrewscheer/status/968965231987830786?lang=en referencing Facebook post https://www.facebook.com/notes/andrew-scheer/happy-purim/1939533102747099/

Reported in Josiah Hotchkiss Gilbert, Dictionary of Burning Words of Brilliant Writers (1895), p. 150.

As quoted in Notable Thoughts About Women : A Literary Mosaic (1882) by Maturin Murray Ballou, p. 311

Plugged In: Can Elon Musk lead the way to an electric-car future?, New Yorker, 24 August 2009, 7 February 2015 http://www.newyorker.com/magazine/2009/08/24/plugged-in,

Lecture I, p. 23
The Duties of Women (1881)

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 345.

An Essay on the Trial by Jury, Boston, MA: John P. Jewett and Company, Cleveland, Ohio: Jewett, Proctor & Worthington (1852) p. 5

Letter to Felice Bauer (22 November 1912), in Letters to Felice by Franz Kafka, translated by James Stern and Elizabeth Duckworth (New York: Shocken Books, 2016), p. 57 https://books.google.it/books?id=EwVSqTfHdEAC&pg=PA57.
Sultãn Ahmad Shãh I of Gujrat (AD 1411-1443)General order
Tãrîkh-i-Firishta
Source: Ideas have Consequences (1948), pp. 28-30.

"Chu Ch'ēn Village" (A.D. 811)
Arthur Waley's translations

Reacting to increasing number of train mishaps, Patna ([Boarding a train? Pray to God, http://timesofindia.indiatimes.com/articleshow/761797.cms, The Times of India, July 02, 2004, 2006-05-08]).

ICTY Transcript, Page 10636 - Mesić's cross-examination by Slobodan Milošević at the ICTY on 2 October 2002, 8 April 2012 http://www.icty.org/x/cases/slobodan_milosevic/trans/en/021002IT.htm, Responding to an earlier quote in which he stated My task has come to an end. There is no more Yugoslavia. ("Moj posao je završen - Jugoslavije više nema") 5 December 1991 in the Croatian parliament having left the presidency of the Yugoslav presidency.

Jiang Yi-huah (2013) cited in " Premier looks back, forward in corruption fight http://www.chinapost.com.tw/taiwan/national/national-news/2013/05/02/377546/Premier-looks.htm" on The China Post, 2 May 2013

Trial of John Vint and others (1799), 27 How. St. Tr. 640.