Devibhagavatapurana 11.21.19

Devībhāgavatapurāṇa 11.21.19

brahmacārī yatheṣṭaṃ ca gomūtraṃ vidhipūrvakam |
prokṣaṇaṃ navavāraṃ ca ṣaḍvāraṃ ca trivārakam ||