Beis Shammai say: One may not sell him a plowing cow during the seventh [year]. But Beis Hillel permit this, since he can slaughter it. One may sell him produce even during the planting season; and he may lend him his seah-measure even though he knows that he has a threshing-floor; and he may change maos into perutos for him, even though he knows that he has workers. But all of these are forbidden if they were stated explicitly.

The potter may sell [up to] five oil jugs and fifteen wine jugs [to a person], since that is what one can [reasonably] bring from ownerless [property]; but if he brought more than this, it is permitted. He may sell to non-Jews in the Land [of Israel] and to a Jew outside the Land.