Natyashastra
शम्या चतुष्कला स्याद्द्विकलस्तालश्च कर्तव्यः । पुनरेव सन्निपातश्च षट्कलः संविधातव्यः ॥ १६५॥
The Samyā should be of four Kalās, and the Dvi-Kalā Tala should be performed. Then again, the Sannipāta of six Kalās is to be arranged.
english translation
zamyA catuSkalA syAddvikalastAlazca kartavyaH । punareva sannipAtazca SaTkalaH saMvidhAtavyaH ॥ 165॥
hk transliteration by Sanscript