Skandapurana 6.3.90.2

6.3.90.2

dānavānāṃ vadhaṃ kṛtvā suptastatra janārdanaḥ .
cakraṃ prakṣālitaṃ tatra devadevena cakriṇā .
sudarśanaṃ ca niṣpāpaṃ revājalasamāśrayāt .. 90.2 ..

Having slain the Dānavas, Janārdana slept there. / The discus was washed there by the god of gods, the discus-bearer, / and Sudarśana became sinless through resorting to the water of the Revā.