Where does “rubai” come from?

rubai (English) comes from Arabic رُبَاعِيّ, from Arabic أَرْبَعَة — four.

rubai (English): quatrain in classical Arabic, Persian, Turkic or...

Definitions

Step	Language	Word	Meaning
1	Arabic	رُبَاعِيّ	—
2	Arabic	أَرْبَعَة	four

rubai — Etymology, Origin & Word History | Etymology Explorer