Mbh 13.10.4a

"'Bhishma continued, "Thus addressed by the ascetic, the Sudra began to reflect in his mind, O king, saying, 'How should I now act? Great is my reverence for those religious duties that lead to merit. Let this, however, be settled, that I shall do what would be for my benefit.'[20] Proceeding to a spot that was distant from that asylum, he made a hut of the twigs and leaves of trees. Erecting also a sacrificial platform, and making a little space for his sleep, and some platforms for the use of the deities, he began, O chief of the Bharatas, to lead a life regulated by rigid observances and vows and to practise penances, abstaining entirely from speech all the while. He began to perform ablutions thrice a day, observe other vows (in respect of food and sleep), make sacrifices to the deities, pour libations on the sacrificial fire, and adore the worship and deities in this way. Restraining all carnal desires, living abstemiously upon fruits and roots, controlling all his senses, he daily welcomed and entertained all that came to his retreat as guests, offering them herbs and fruits that grew plentifully around. In this way he passed a very long time in that hermitage of his.[21] One day an ascetic came to that Sudra's retreat for the purpose of making his acquaintance. The Sudra welcomed and worshipped the Rishi with due rites, and gratified him highly. Endued with great energy, and possessed of a righteous soul, that Rishi of rigid vows conversed with his host on many agreeable subjects and informed him of the place whence he had come. In this way, O chief of the Bharatas, that Rishi, O best of men, came into the asylum of the Sudra times out of a number for the object of seeing him. On one of these occasions, the Sudra, O king, addressing the Rishi said,--'I desire to perform the rites that are ordained for the Pitris. Do thou instruct me kindly in this matter.'--'Very well,'--the Brahmana said in reply unto him, O monarch.