Skandapurana 5.189.31

5.189.31

varuṇasya pratuṣṭyarthaṃ snānaṃ kāryaṃ tvayaiva ca ..
ṛtvigbhiḥ sahitenaiva sarvāriṣṭapraśāṃtaye .. 31 ..

For the pleasure of Varuṇa, ritual ablution must be performed by you alone, / accompanied by the officiating priests, for the pacification of all misfortunes.