अधोलोकवर्णनम् (Adholoka-varṇana) — Description of the Lower Worlds and Cosmographic Measures
काष्ठा निमेषा दश पञ्च चैव त्रिंशच्च काष्ठा गणयेत्कलां तु / त्रिंशत्कलाश्चापि भवेन्मुहूर्त्तस्तैस्त्रिंशता रात्र्यहनी समेते
kāṣṭhā nimeṣā daśa pañca caiva triṃśacca kāṣṭhā gaṇayetkalāṃ tu / triṃśatkalāścāpi bhavenmuhūrttastaistriṃśatā rātryahanī samete
Ten and five nimeṣas make one kāṣṭhā; thirty kāṣṭhās are reckoned as one kalā; thirty kalās become one muhūrta; and by thirty muhūrtas, night and day are made complete.