Skandapurana 6.3.230.38

6.3.230.38

māṇḍavyāśramatīrthaṃ ca viśokāsaṅgamastathā .
vāgīśvaraṃ nāma tīrthaṃ puṇyo vai vāgusaṅgamaḥ .. 230.38 ..

and the sacred ford of Māṇḍavya's hermitage, and the confluence of the Viśokā; / the sacred ford named Vāgīśvara, and the holy confluence of the Vāgu;