Natyashastra
विशेषेण कलास्तत्र पूर्वं पूर्वं निवेशयेत् । द्विकले भद्रके चैव त्रिकलं स्यादुपोहनम् ॥ २२०॥
Specifically, the Kalās are to be placed one after another; in the Bhadraka, two Kalās are used, and in the third, the Upohana is applied.
english translation
vizeSeNa kalAstatra pUrvaM pUrvaM nivezayet । dvikale bhadrake caiva trikalaM syAdupohanam ॥ 220॥
hk transliteration by Sanscript