Ruba'i
A rubāʿī (Classical Persian: رباعی, romanized: robāʿī, from Arabic رباعيّ, rubāʿiyy, 'consisting of four, quadripartite, fourfold'; plural: رباعيّات, rubāʿiyyāt) or chahārgāna(e) (Classical Persian: چهارگانه) is a poem or a verse of a poem in Persian poetry (or its derivative in English and other languages) in the form of a quatrain, consisting of four lines (four hemistichs). In classical Persian poetry, the ruba'i is written as a four-line (or two-couplet / two-distich) poem, with a rhyme-scheme A A B A {\displaystyle \mathrm {AABA} } or A A A A {\displaystyle \mathrm {AAAA} } .