It's from T. S. Eliot's "The Wasteland": IV. Death by Water Phlebas the Phoenician, a fortnight dead, Forgot the cry of gulls, and the deep sea

It's from T. S. Eliot's "The Wasteland": IV. Death by Water Phlebas the Phoenician, a fortnight dead, Forgot the cry of gulls, and the deep sea swell And the profit and loss. A current under sea Picked his bones in whispers. As he rose and fell He passed the stages of his age and youth Entering the whirlpool. Gentile or Jew O you who turn the wheel and look to windward, Consider Phlebas, who was once handsome and tall as you. I get Phlebas mixed up with those lines from Shakespeare's "The Tempest", where we get the idiom "sea change": Full fathom five thy father lies, Of his bones are coral made, Those are pearls that were his eyes, Nothing of him that doth fade, But doth suffer a sea-change, into something rich and strange, Sea-nymphs hourly ring his knell, Ding-dong. Hark! now I hear them, ding-dong, bell.