Source identified1
“The Moving Finger writes; and, having writ, Moves on: nor all thy Piety nor Wit Shall lure it back to cancel half a Line, Nor all thy Tears wash out a Word of it.”
The quatrain turns irreversibility into an image of writing that cannot be erased: tears, intelligence and devotion cannot literally rewrite what has already entered the past.
Source note: Rubáiyát of Omar Khayyám, quatrain LI in Edward FitzGerald’s English rendering, Project Gutenberg #246. The famous English wording is FitzGerald’s creative translation and adaptation, so the record does not present it as a literal English sentence written by the historical Omar Khayyam.