Hayagriva

The Lord appeared as the Hayagriva incarnation in a sacrifice performed by Brahma. He is the personified sacrifices, and the hue of His body is golden. He is the personified Vedas as well, and the Supersoul of all demigods. When He breathed, all the sweet sounds of the Vedic hymns came out of His nostrils.

At the end of each kalpa, when the demon Ajana steals the Vedic knowledge, Lord Hayagriva appears and preserves it. Then He delivers it to Lord Brahma

The Lord appeared as Hayagriva, with the head of a horse. He killed two demons known as Madhu and Kaitabha, who were full of the modes of passion and ignorance. For this reason, all the great saints accept his Forms as transcendental, untinged by material qualities.