Matsyapurana 47.6

47.6

dattvainaṃ nandagopasya rakṣyatāmiti cābravīt
atastu sarvakalyāṇaṃ yādavānāṃ bhaviṣyati
ayaṃ tu garbho devakyāṃ jātaḥ kaṃsaṃ haniṣyati //

In compliance with those words of Vasudeva, Lord Kṛiṣṇa hid His form of Divine glory and asked Him to send him to the house of Nanda. Accordingly, Vasudeva took him to the house of Nanda, and requested the latter to look after the Divine babe, like his own child, and added that the celestial infant would bring prosperity to the Yâdavas; and this child, born of the womb of Devakî, will kill Kaṃsa.—5-6.