Rubaiyat of Omar Khayyam is a collection of poems (of which there are about a thousand) attributed to the Persian mathematician and astronomer 
Omar Khayyám (1048-1123). "Rubaiyat" means "quatrains": verses of four lines.
 Fitzgerald translation, version 1 
-  Morning when dawn's left hand was in the sky
 I heard a voice within the tavern cry
 Awake my little ones and fill the cup
 Before life's liquor in its cup be dry.
-  Here with a Loaf of Bread beneath the Bough
 A Flask of Wine, a Book of Verse, and Thou
 Beside me singing in the Wilderness
 Oh, Wilderness were Paradise enow!
-  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.