kāla{kalā}paryanta kṣaṇaḥ, viṃśakṣaṇaśatamekastatkṣaṇaḥ ṣaṣṭitat kṣaṇā eko lava iti samayaḥ /
A kṣaṇa extends to [the length of] a kalā; one hundred and twenty kṣaṇas make one tatkṣaṇa; sixty tatkṣaṇas make one lava - such is the convention.