Under bare Ben Bulben's head In Drumcliffe churchyard Yeats is laid, An ancestor was rector there Long years ago; a church stands near, By the road an ancient Cross. No marble, no conventional phrase, On limestone quarried near the spot By his command these words are cut: Cast a cold eye On life, on death. Horseman, pass by!

-Yeats,W(illiam) B(utler)
  'Under Ben Bulben', stanza 6. Collected in Last Poems (1939).The last three lines were used as his epitaph.