Matsyapurana 70.9

70.9

uttārabhūtaṃ dāsatvaṃ samudrādbrāhmaṇapriyaḥ
upadekṣyatyanantātmā bhāvikalyāṇakārakam //

Then those ladies, overcome with grief on account of such a curse, will please Kṛiṣṇa (by their prayers), when the Lord will say: ‘Dâlbhya Ṛiṣi of eternal soul, the favourite of the Brâhmaṇas, will teach you a vrata, which will be the means of your liberation from the bondage and which will actually free you all. This vrata will be of great benefit to futurity. With these words, the Lord of Dvârâvatî left them.—8-10.