Garudapurana 1.213.17

1.213.17

jaṭitvamagnihotratvaṃ bhūśayyājinadhāraṇam /
vane vāsaḥ payomūlanīvāraphalavṛttitā //

Wearing matted hair, maintaining the Agnihotra fire, sleeping on the ground, wearing animal hides, / dwelling in the forest, and subsisting on milk, roots, wild grain, and fruits;