tvayā - by you; arcitaḥ - being worshiped; ca - also; aham - I; apatya-guptaye - giving protection to your sons; payaḥ-vratena - by the payo-vrata vow; anuguṇam - as far as possible; samīḍitaḥ - properly worshiped; sva-amśena - by My plenary portion; putratvam - becoming your son; upetya - taking this opportunity; te sutān - to your other sons; goptā asmi - I shall give protection; mārīca - of Kaśyapa Muni; tapasi - in the austerity; adhiṣṭhitaḥ - situated.

You have prayed to Me and properly worshiped Me by performing the great payo-vrata ceremony for the sake of protecting your sons. Because of Kaśyapa Muni’s austerities, I shall agree to become your son and thus protect your other sons.