Matsya Purana 227.83

227.83

guruvarjyantu mārgārhaṃ yo hi mārgaṃ na yacchati.
sa dāpyaḥ kṛṣṇalaṃ rājñastasya pāpasya śāntaye .. 227.82 ..

One who does not make room for another sagelike person other than his preceptor should be fined one ratti of silver (one Kṛṣṇala)—82

A Brâhmaṇa who indulges with a Châṇḍâla woman or a woman of a different caste or eats their food or accepts a gift from them unknowingly tolas of gold or silver according to the seriousness of the offence The one who breaks anyone's bone should be exiled from the country—87