Devibhagavatapurana 3.15.59

3.15.59

pālayasva sutaṃ kāntaṃ rājā te'yaṃ bhaviṣyati |
nātra duḥkhaṃ tathā śokaḥ kadācitsambhaviṣyati ||

Better nourish and support your child. Your son will surely be a king and if you remain in this hermitage, no sorrow or grief will overtake you.”