“Let them be friends,
devoted as in the old days. Let peace and wealth
come cresting through the land.”

The last sentence of this quote is incised in marble on the wall of the United States House of Representatives chamber, directly behind the Speaker's chair (with the word "develop" spelled with a final "e").
Address on Laying the Cornerstone of the Bunker Hill Monument (1825)
Context: Our proper business is improvement. Let our age be the age of improvement. In a day of peace, let us advance the arts of peace and the works of peace. Let us develop the resources of our land, call forth its powers, build up its institutions, promote all its great interests, and see whether we also, in our day and generation, may not perform something worthy to be remembered.

England's Trust, part iii, line 227, reported in Bartlett's Familiar Quotations, 10th ed. (1919).
Context: No: by the names inscribed in History's page,
Names that are England's noblest heritage,
Names that shall live for yet unnumbered years
Shrined in our hearts with Cressy and Poictiers;
Let wealth and commerce, laws and learning die,
But leave us still our old nobility.

Life Without Principle (1863)
Context: I do not know but it is too much to read one newspaper a week. I have tried it recently, and for so long it seems to me that I have not dwelt in my native region. The sun, the clouds, the snow, the trees say not so much to me. You cannot serve two masters. It requires more than a day's devotion to know and to possess the wealth of a day.

Source: Gravity's Rainbow

From a letter to Tevis Clyde Smith (January 14, 1926)
Letters

Psalm 117.
1710s, "Our God, our help in ages past" (1719)

The Crisis No. I.
1770s, The American Crisis (1776–1783)
Context: I once felt all that kind of anger, which a man ought to feel, against the mean principles that are held by the Tories: a noted one, who kept a tavern at Amboy, was standing at his door], with as pretty a child in his hand, about eight or nine years old, as I ever saw, and after speaking his mind as freely as he thought was prudent, finished with this unfatherly expression, "Well! give me [[peace in my day."
Not a man lives on the continent but fully believes that a separation must some time or other finally take place, and a generous parent should have said, "If there must be trouble, let it be in my day, that my child may have peace;" and this single reflection, well applied, is sufficient to awaken every man to duty.

Saying 141

Byegones, l. 1-4.
Ballads for the Times (1851)