Matsyapurana 61.16

61.16

tasmādekena vapuṣā munirūpeṇa mānuṣe
mārutena samaṃ loke tava janma bhaviṣyati //

and Śâstra; therefore You, O fire, will now be born by assuming one body along with Maruta, among the mortals, in the form of a sage. In that form of the sage Agastya, you will dry up the ocean, after which you will again come back to your Divine form.”—14-17.