Skandapurana 14.32.24

14.32.24

māghamāse site pakṣe caturthyāṃ samupoṣitaḥ ..
yastaṃ paśyati vāggmī sa sarvajñaśca prajāyate ..
tasyāgre sumahatkuṇḍaṃ svacchodakapūritam .. 24 ..

Fasting on the fourth day of the bright fortnight in the month of Māgha, / he who sees him becomes eloquent and omniscient. / In front of him is a very large pool filled with clear water;