Mbh 12.356.2

"'Bhishma continued, "Hospitably waited upon by that Brahmana, the learned guest, O slayer of foes, passed that night in the company of his host. Indeed, both of them passed the night happily, conversing cheerfully with each other on the subject of the duties of the fourth mode of life, viz., Sannyasa (Renunciation). So engrossing was the nature of their conversation that the night passed away as if it were day. When morning came, the guest was worshipped with due rites by the Brahmana whose heart had been eagerly set upon the accomplishment of what (according to the discourse of the guest) was regarded by him to be beneficial for himself. Having dismissed his guest, the righteous Brahmana, resolved to achieve his purpose, took leave of his kinsmen and relatives, and set out in due time for the abode of that foremost of Nagas, with heart steadily directed towards it."'"