Devibhagavatapurana 5.2.16

5.2.16

rājovāca |
mahiṣaḥ kasya putro'sau kathaṃ jāto mahābalī |
kathaṃ ca māhiṣaṃ rūpaṃ prāptaṃ tena mahātmanā ||

The king said:-- “O Bhagavân! Whose son was this powerful Mahisâsura; how his birth took place? and why, too, did he get a body of a buffalo?”