Vishnupurana 1.5.41

1.5.41

rajomātrātmikāmeva tatonyāṃ jagṛhe tanum /
tataḥ kṣudbrahmaṇo jātā jajñe kāmastayā tataḥ //

Next from Brahmá, in a form composed of the quality of foulness, was produced hunger, of whom anger was born: and the god put forth in darkness beings emaciate with hunger, of hideous aspects, and with long beards. Those beings hastened to the deity. Such of them as exclaimed, Oh preserve us! were thence called Rákshasas: others, who cried out, Let us eat, were denominated from that expression Yakshas. Beholding them so disgusting, the hairs of Brahmá were shrivelled up, and first falling from his head, were again renewed upon it: from their falling they became serpents, called Sarpa from their creeping, and Ahi because they had deserted the head. The creator of the world, being incensed, then created fierce beings, who were denominated goblins, Bhútas, malignant fiends and eaters of flesh. The Gandharbas were next born, imbibing melody: drinking of the goddess of speech, they were born, and thence their appellation.