Matsya Purana 227.57

227.57

vipraduṣṭāṃ striyaṃ bhartā nirundhyādekaveśmani.
yatpuṃsaḥ paradāreṣu taccaināñcārayed vratam .. 227.56 ..

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