SB 8.24.57
atita-pralayapaya
utthitaya sa vedhase
hatvasuram hayagrivam
vedan pratyaharad dharih
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
At the end of the last inundation [during the period of Svayambhuva Manu] the Supreme Personality of Godhead killed the demon named Hayagriva and delivered all the Vedic literatures to Lord Brahma when Lord Brahma awakened from sleeping.