अग्नि , awakened on earth, ushers in the dawn and calls for the अश्विन्स् to harness their chariot [rv-1-157-1 ] rv • Book 1 . The अश्विन्स् , with their chariot of medicine, bring strength, prosperity, and riches [rv-1-157-2 ] rv • Book 1 . They sustain life and balance nature, offering vitality, obliterating sins, and aiding worshippers through medicinal knowledge and blessings [rv-1-157-4 ] rv • Book 1 .