Skandapurana 5.22.18

5.22.18

tāṃ visaṃjñāmatho vīkṣya tyaktvā pādau śatakratuḥ ..
praviveśodaraṃ tasyāstīkṣṇaṃ śastraṃ kare dadhat ..
tenā'sau saptadhā cake garbhaṃ śastreṇa devapaḥ .. 18 ..

Seeing her unconscious, Śatakratu let go of her feet / and entered her womb, holding a sharp weapon in his hand. / With that weapon, the lord of gods cut the embryo into seven pieces.