Revākhaṇḍa of the Skandapurāṇa manuscripts (RKS) 28.18

28.18

vidhāsyāmo vayaṃ cātra putreṣṭiṃ paramāṃ tadā /
vīryeṇa śakratulyaṃ tvaṃ putraṃ vai janayiṣyasi //

And we shall perform here the supreme sacrifice for obtaining a son; / you will indeed give birth to a son equal to Śakra in prowess.”