Mudgalapurana 4.2.28

4.2.28

tataḥ kṛṣṇāṃ caturthīṃ sa jagāda gaṇanāyakaḥ |
varaṃ vṛṇu mahābhāge dāsyāmi manasīpsitam ||

Then the leader of the Gaṇas addressed the dark fourth lunar day: / “Choose a boon, O fortunate one; I shall grant what your heart desires.”