Skandapurana 1.4.37.105

1.4.37.105

kūpe snānaṃ naraḥ kṛtvā saṃtarpya ca pitṝnnijān..
pūjayedbarkareśaṃ yaḥ sarpapāpaiḥ sa mucyate.. 39.105 ..

a man who bathes in the well, offers oblations to his ancestors, / and worships Barkareśa is freed from sins associated with serpents.”