Mbh 1.58.7

“Astika said, ‘Let those Brahmanas, and other men, who shall, in the morning or in the evening, cheerfully and with attention, read the sacred account of this my act, have no fear from any of you.’ And the snakes in joy thereupon said, ‘O nephew, in the nature of thy boon, let it be exactly as thou sayest. That which thou askest we all shall cheerfully do, O nephew! And those also that call to mind Astika, Artiman and Sunitha, in the day or in the night, shall have no fear of snakes. He again shall have no fear of snakes who will say, ‘I call to mind the famous Astika born of Jaratkaru, that Astika who saved the snakes from the snake-sacrifice. Therefore, ye snakes of great good fortune, it behoveth you not to bite me. But go ye away, blessed be ye, or go away thou snake of virulent poison, and remember the words of Astika after the snake sacrifice of Janamejaya. That snake who does not cease from biting after hearing such mention of Astika, shall have his hood divided a hundredfold like the fruit of Sinsa tree.’