Bhagavatapurana 3.18.20

3.18.20

daityasya yajñāvayavasya māyā- gṛhīta-vārāha-tanor mahātmanaḥ /
kauravya mahyāṃ dviṣator vimardanaṃ didṛkṣur āgād ṛṣibhir vṛtaḥ svarāṭ //

20. O descendant of the Kurus, Brahma surrounded by Rishis came thither to witness the combat between the two who hated each other and fought for the earth—the two, Hiranyaksha the son of Diti and the Supreme Being who had through Maya assumed the Varaha form the members of which are all yagnas (sacrifices).