Brahma Purana 57.21

Brahmapurāṇa 57.21

praviśyāyatanaṃ viṣṇoḥ kṛtvā taṃ triḥ pradakṣiṇam
saṃkarṣaṇaṃ svamantreṇa bhaktyāpūjya prasādayet //