מילון על בראשית 41:8

If a person plows from a pit full of bones, or from a heap of bones, Or from a field in which a grave had been lost, Or in which a grave was subsequently found, Or if he plows a field which was not his own, Or if a non-Jew plowed, he does not make a bet peras. For the rule of bet peras does not apply [even] to Samaritans.