Revākhaṇḍa ascribed to the Vāyupurāṇa (RKV) 72.21

72.21

putrāṇāṃ kathitaṃ pārtha paṇaṃ caiva mayā kṛtam /
hāhākāraḥ kṛtaḥ sarpaiḥ śrutvā mātrā paṇaṃ kṛtam //

She said to her sons, "O Pāṇḍava, a wager was indeed made by me." / A cry of despair was raised by the serpents upon hearing that the wager was made by their mother.