Do-baytī

Do-bayti (Persian: دوبیتی) (literally "two-couplet"), also known as fahlaviyat, is an ancient form of Persian poetry. It is used to describe a Persian quatrain (a stanza or poem of four lines), similar to Ruba'i but different in meter.

A do-bayti has four half-lines of 11 syllables each, and usually uses the hazaj meter:

| u – – – | u – – – | u – – |

The first two syllables may sometimes be replaced by – u or – –.

The rhyme scheme is a a a a or a a b a.

When sung to a traditional melody, the first two lines are sung continuously in one 22-syllable phrase, and the 3rd and 4th lines in another, a little lower in pitch. (See External links below.)