Matsyapurana 22.22

22.22

adyāpi pitṛtīrthaṃ tat sarvakāmaphalapradam
nīlakuṇḍamiti khyātaṃ pitṛtīrthaṃ dvijottamāḥ //

even today it is an ancestral tīrtha granting the fruit of all desires.
O best of the twice-born, the ancestral tīrtha renowned as Nīlakuṇḍa;