Mbh 14.26.1a

"'"The Brahmana said, 'There is one Ruler. There is no second beside him. He that is Ruler resides in the heart. I shall speak now of him. Impelled by Him, I move as directed, like water along an inclined plane. There is one Preceptor. There is no second beside him. He resides in the heart, and of him I shall now speak. Be instructed by that preceptor; they who are always endued with feelings of animosity are like snakes. There is one kinsman. There is no second beside him. He resides in the heart of him I shall now speak. Instructed by him, kinsmen become possessed of kinsmen, and the seven Rishis, O son of Pritha, shine in the firmament. There is one dispeller. There is no second beside him. He resides in the heart. Of him I shall now speak. Having lived with that instructor under the proper mode of living, Sakra attained to the sovereignty of all the worlds.[73] There is one enemy. There is no second beside him. He resides in the heart. Of him I shall now speak. Instructed by that preceptor all snakes in the world are always endued with feelings of animosity. In this connection is cited the ancient story of the instruction of the snakes, the deities, and the Rishis by the Lord of all creatures. The deities and the Rishis, the snakes, and the Asuras, seated around the Lord of all creatures, asked him, saying,--"Let that which is highly beneficial for us be declared." Unto them that enquired about what is highly beneficial, the holy one uttered only the word Om, which is Brahman in one syllable. Hearing this, they ran away in various directions. Amongst them that thus ran in all directions from desire of self-instruction, the disposition first arose in snakes of biting. Of the Asuras, the disposition, born of their nature for ostentations, pride arose. The deities betook themselves to gifts, and the great Rishis to self-restraint.