“Bom. So have I heard on Afric's burning shore
A hungry lion give a grievous roar;
The grievous roar echoed along the shore.
Artax. So have I heard on Afric's burning shore
Another lion give a grievous roar;
And the first lion thought the last a bore.”
Bombastes Furioso (1810), Act i, scene 4, reported in Bartlett's Familiar Quotations, 10th ed. (1919).
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William Barnes Rhodes 2
British dramatist 1772–1826Related quotes
“And the weed loud, like a lion's roar.”
Intro, written with Willie Hodge and Jermaine Preyan
2010s, Tha Carter IV (2011)

Speech in Westminster Hall (30 November 1954), quoted in The Times (1 December 1954), p. 11
Post-war years (1945–1955)

“Did you think the lion was sleeping because he didn't roar?”
Die Verschwörung des Fiesco (The Conspiracy of Fiesco), Act I, sc. xviii (1783)

“Americans used to roar like lions for liberty; now we bleat like sheep for security.”

“While the hoarse ocean beats the sounding shore,
Dashed from the strand, the flying waters roar.”
Tunc longe sale saxa sonant, tunc et freta ventis
Incipiunt agitata tumescere: littore fluctus
Illidunt rauco.
Book III, line 388. Compare:
But when loud surges lash the sounding shore,
The hoarse rough verse should like the torrent roar.
Alexander Pope, An Essay on Criticism, Part II, line 168
De Arte Poetica (1527)

"The Triumphs of Owen. A Fragment", from Mr. Evans's Specimens of the Welch Poetry (1764) http://www.thomasgray.org/cgi-bin/display.cgi?text=trow

“Oops! Sorry! I heard someone say “Roar” so it’s kinda went for it.”
As quoted in Monsters University.