Cursed be he that removeth his neighbour's landmark. And all the people shall say, Amen.

-Bible (Old Testament)
Deuteronomy 27:17.

Hier stehe ich. Ich kann nicht anders. Gott helfe mir. Amen. Here I stand; I can do no other; God help me; Amen.

-Luther, Martin
  Speech in defence of his doctrines at the Diet of  Worms, 18  Apr. The Diet subsequentlydenouncedhis ideas as heretical.

Seated one day at the organ, I was weary and ill at ease, And my fingers wandered idly Over the noisy keys; I know not what I was playing, Or what I was dreaming then, But I struck one chord of music, Like the sound of a great Amen.

-Proctor, Adelaide Ann pseudonym of  Mary Berwick
  'The Lost Chord'.

Glorious the northern lights astream; Glorious the song, when God's the theme; Glorious the thunder's roar: Glorious hosanna from the den; Glorious the catholic amen; Glorious the martyr's gore.

-Smart, Christopher
  A Song to David, stanza 85.