Mudgalapurana 3.40.10

3.40.10

sa āgata uvācaināṃ kimarthaṃ duḥkhitā vada |
mātaste duḥkhanāśaṃ ca kariṣyāmi na saṃśayaḥ ||

Having arrived, he said to her: "Tell me, why are you grieving?
O mother, I will destroy your grief, there is no doubt."