The Upanishads, Part 1 (SBE01), by Max Müller, , at sacred-texts.com
1. Then Gânasruti Pautrâyana took six hundred cows, a necklace, and a carriage with mules, went to Raikva and said:
2. 'Raikva, here are six hundred cows, a necklace, and a carriage with mules; teach me the deity which you worship.'
3. The other replied: 'Fie, necklace and carriage be thine, O Sûdra, together with the cows.'
Then Gânasruti Pautrâyana took again a thousand cows, a necklace, a carriage with mules, and his own daughter, and went to him.
4. He said to him: 'Raikva, there are a thousand cows, a necklace, a carriage with mules, this wife, and this village in which thou dwellest. Sir, teach me!'
5. He, opening her mouth 2, said: 'You have
brought these (cows and other presents), O Sûdra, but only by that mouth did you make me speak.'
These are the Raikva-parna villages in the country of the Mahâvrishas (mahâpunyas) where Raikva dwelt under him 1. And he said to him:
57:2 To find out her age. The commentator translates, 'Raikva, knowing her mouth to be the door of knowledge, i. e. knowing that for her he might impart his knowledge to Gânasruti, and that p. 58 Gânasruti by bringing such rich gifts had become a proper receiver of knowledge, consented to do what he had before refused.'
58:1 The commentator supplies adât, the king gave the villages to him.