The Mahabharata/Book 1: Adi Parva…
“ And the Grandsire addressing him, that penance-practising one of great fortitude, said, 'What is that thorn doest, O Sesha? Let the welfare of the creatures of the worlds also engage thy thoughts. O sinless one, thou art afflicting all creatures by thy hard penances. O Sesha, tell me the desire implanted in thy breast.'"And Sesha replied, 'My uterine brothers are all of wicked hearts. I do not desire to live amongst them. Let this be sanctioned by thee. Like enemies they are always jealous of one another. ”
