The Law Code of Devala 7.6: Dīpakalikā · Smṛtiviveka

7.6

ekaśayyāsanaṃ paṅktibhāṇḍapakvānnamiśraṇam | yājanādhyāpanaṃ yonis tathā ca sahabhojanam || navadhā saṃkaraḥ prokto na kartavyo 'dhamaiḥ saha

If what is undrinkable has been drunk, and what is inedible has been eaten, / and intercourse with an illicit woman has been performed by a Brahmin carried off by Mlecchas,

Sharing a bed or a seat, the dining row, vessels, mixing cooked food, officiating, teaching, marriage and eating together: association is declared to be of nine kinds; it is not to be practised with the vile.