Matsya Purana 227.56

227.56

cāṇḍālāntya striyo gatvā bhuktvā ca pratigṛhya ca.
patatyajñānato vipro jñānāt sāmyantu gacchati .. 227.55 ..

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