Devibhagavatapurana 1.4.51

1.4.51

tapaścarāmi satataṃ tadadhīno'smyahaṃ sadā |
kadācitsaha lakṣyā ca viharāmi yathāsukham ||

I am always subservient to that Maha S’akti; (under Her command) I am engaged in Tapasyâ for a long time; (By Her command) some time I enjoy with Lakshmî; some time I fight battles, terrible to all the Lokas, with the Dânavas, involving great bodily troubles. O Know of Dharma! It was before Your presence that I fought hand to hand fight for five thousand years before Your sight on that one great ocean in long-past days with the two demons Madhu and Kaitabha, sprung from the wax of my ear, maddened with pride; and by the grace of the Devî, successfully killed the two Dânavas.