Mbh 6.29.3c

He who findeth happiness within himself, (and) who sporteth within himself, he whose light (of knowledge) is deprived from within himself, is a devotee, and becoming one with Brahma attaineth to absorption into Brahma. Those saintly personages whose sins have been destroyed, whose doubts have been dispelled, who are self-restrained, and who are engaged in the good of all creatures, obtain absorption into Brahma. For these devotees who are freed from desire and wrath, whose minds are under control, and who have knowledge of self, absorption into Brahma exists both here and thereafter.[190] Excluding (from his mind) all external objects of sense, directing the visual glance between the brows, mingling (into one) the upward and the downward life-breaths and making them pass through the nostrils, the devotee, who has restrained the senses, the mind, and the understanding, being intent on emancipation, and who is freed from desire, fear, and wrath, is emancipated, indeed. Knowing me to be enjoyer of all sacrifices and ascetic austerities, the great Lord of all the worlds, and friend of all creatures, such a one obtaineth tranquillity.’”