Mahabharata 3.132.2

3.132.2

sākṣādatra śvetaketurdadarśa sarasvatīṃ mānuṣadeharūpām |
vetsyāmi vāṇīmiti saṃpravṛttāṃ sarasvatīṃ śvetaketurbabhāṣe || 2 ||

"Lomasa said, 'See here, O lord of men, the sacred hermitage of Swetaketu, son of Uddalaka, whose fame as an expert in the sacred mantras is so widely spread on earth. This hermitage is graced with cocoanut trees. Here Swetaketu beheld the goddess Saraswati in her human shape, and spake unto her, saying, 'May I be endowed with the gift of speech!" In that yuga, Swetaketu, the son of Uddalaka, and Ashtavakra, the son of Kahoda, who stood to each other in the relation of uncle and nephew, were the best of those conversant with the sacred lore. Those two Brahmanas, of matchless energy, who bore unto each other the relationship of uncle and nephew, went into the sacrificial ground of king Janaka and there defeated Vandin in a controversy. Worship, O son of Kunti, with thy brothers, the sacred hermitage of him who had for his grandson Ashtavakra, who, even when a mere child, had caused Vandin to be drowned in a river, after having defeated him in a (literary) contest.'