Brahma Purana 236.69

Brahmapurāṇa 236.69

ajaṃ purāṇam ajaraṃ sanātanaṃ
yam indriyātigam agocaraṃ dvijāḥ
avekṣya cemāṃ parameṣṭhisāmyatāṃ
prayānty anāvṛttigatiṃ manīṣiṇaḥ