“They say in the grave there is peace, and peace and the grave are one and the same.”

Prometheus, Act I, l. 638
Prometheus Unbound (1818–1819; publ. 1820)

"Sick Love," lines 10–12, from Poems 1929.
Poems

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 4, hadith number 584
Sunni Hadith

The Jesus of Nazareth who cleansed the temple was demonstrating that Right deserves to be defended.
The Naked Communist (1958)

1963, American University speech
Context: I have, therefore, chosen this time and this place to discuss a topic on which ignorance too often abounds and the truth is too rarely perceived — yet it is the most important topic on earth: world peace. What kind of peace do I mean? What kind of peace do we seek? Not a Pax Americana enforced on the world by American weapons of war. Not the peace of the grave or the security of the slave. I am talking about genuine peace, the kind of peace that makes life on earth worth living, the kind that enables men and nations to grow and to hope and to build a better life for their children — not merely peace for Americans but peace for all men and women — not merely peace in our time but peace for all time.

Final proclamation to the people of Colombia (8 December 1830), as quoted in Man of Glory : Simón Bolívar (1939) by Thomas Rourke
Variant translations: If my death contributes to the end of the parties and the consolidation of the Union, I shall go quietly to my grave.
Colombians! my last wishes are for the welfare of the fatherland. If my death contributes to the cessation of party strife, and to the consolidation of the Union, I shall descend in peace to the grave.
For my enemies I have only forgiveness. If my death shall contribute to the cessation of factions and the consolidation of the Union, I can go tranquilly to my grave.

Weariness.

The Doctrine of Repentance (1668)