Mbh 13.150.2a

"'Bhishma said, "Hear, O king, with concentrated attention, what that Mantra is which was declared by Vyasa. It was ordained by Savitri and is possessed of great excellence. It is capable of cleansing a person immediately of all his sins. Hear, O sinless one, as I recite to thee the ordinances in respect of that Mantra. Indeed, O chief of the sons of Pandu, by listening to those ordinances, one becomes cleansed of all one's sins. One who recites this Mantra day and night becomes never stained by sin. I shall now declare it to thee what that Mantra is. Do thou listen with concentrated attention. Indeed, the man that hears it becomes endued with long life, O prince, and attaining to the fruition of all his wishes, sports in felicity both here and hereafter. This Mantra, O king, was daily recited by the foremost of royal sages devoted to the practice to Kshatriya duties and steadily observant of the vow of truth. Indeed, O tiger among kings, those monarchs who, with restrained senses and tranquil soul, recite this Mantra every day, succeed in acquiring unrivalled prosperity--Salutations to Vasishtha of high vows after having bowed with reverence unto Parasara, that Ocean of the Vedas! Salutations to the great snake Ananta, and salutations to all those who are crowned with success, and who are of unfading glory! Salutations to the Rishis, and unto Him that is the Highest of the High, the god of gods, and the giver of boons unto all those that are foremost. Salutations unto Him of a thousand heads, Him that is most auspicious, Him that has a thousand names, viz., Janardana! Aja, Ekapada, Ahivradhna, the unvanquished Pinakin, Rita Pitrirupa, the three-eyed Maheswara, Vrishakapi, Sambhu, Havana, and Iswara--these are the celebrated Rudras, eleven in number, who are the lords of all the worlds. Even these eleven high-souled ones have been mentioned as a hundred in the Satarudra (of the Vedas).