Divyāv, 2, 306.0 te rātryāḥ pratyūṣasamaye udānāt pārāyaṇāt satyadṛśaḥ sthaviragāthāḥ śailagāthā munigāthā arthavargīyāṇi ca sūtrāṇi vistareṇa svareṇa svādhyāyaṃ kurvanti //