Mahabharata 1.32.12

1.32.12

so'haṃ tapaḥ samāsthāya mokṣyāmīdaṃ kalevaram |
kathaṃ me pretyabhāve'pi na taiḥ syātsaha saṃgamaḥ || 12 ||

"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. I am, therefore, engaged in ascetic devotions. I will not see them even. They never show any kindness for Vinata and her son. Indeed, Vinata's son capable of ranging through the skies, is another brother of ours. They always envy him. And he, too, is much stronger owing to the bestowal of that boon by our father, the high-souled Kasyapa. For these, I engaged in ascetic penances, and I will cast off this body of mine, so that I may avoid companionship with them, even in another state of life.'