פירוש על עבודה זרה 97:14

The second possibility is that it refers to the rabbis in the mishnah about the two leavening agents, one prohibited and one permitted. They hold that no matter what order they are put into the dough, the dough is permitted. But just because they are lenient when it comes to terumah dough does not mean that they are lenient even with regard to idolatry.