I pray for no more youth To perish before its prime; That Revenge and iron-heated War May fade with all that has gone before Into the night of time. Senator Edward Kennedy quoted this passage in testimony before the Commission on Campus Unrest, July 15, 1970. - Congressional Record, vol. 116, p. 24309.
Aeschylus (525 - 456 BC)
Source: This modern version is an adaptation of the Oresteia; these lines are from Eumenides (The Furies).