Skandapurana 6.3.230.23

6.3.230.23

saṅgamo nīlagaṅgāyāḥ vidhvaṃsastripurasya ca .
kīrtanaṃ tīrthadānānāṃ madhukatṛtīyāvratam .. 230.23 ..

the confluence of the Nīlagaṅgā, and the destruction of Tripura, / the mention of gifts at the sacred fords, and the observance of the Madhukatṛtīyā;