Mudgalapurana 2.9.25

2.9.25

priyavrata uvāca |
svāminvijñaptumicchāmi vada me tvaṃ mahāmate |
kenopāyena yogīndra brahmabhūto bhavennaraḥ ||

Priyavrata said:
“Master, I wish to ask; tell me, O noble-minded one: / by what means, O lord of yogins, does a man become one with Brahman?”