Natyashastra
चतुष्कलः सन्निपातः प्रवृत्तमत इष्यते । अस्य तु द्विकला शम्या तथैवैककला पुनः ॥ २५७॥
The Sannipāta consists of four Kalās and is considered to belong to the Pravṛtta type. In this, the Shamya has two Kalās, and the Tāla again has one Kalā.
english translation
catuSkalaH sannipAtaH pravRttamata iSyate । asya tu dvikalA zamyA tathaivaikakalA punaH ॥ 257॥
hk transliteration by Sanscript