פּירוש אויף דברים 15:22

בשעריך תאכלנו, ”you shall eat it within your gates (not on sacred grounds);” the Torah here addresses the priest, as a commoner is not allowed to eat it anywhere.

You may eat it within your gates Some say that the kohen may eat it outside of the Sanctuary. Others assert that, since it is defective, it belongs to the Israelite — but, in my opinion, this is farfetched [the halakha [Bekhorot 33a] is that a common Israelite may eat a defective firstling, once he has acquired it from the kohen — Translator].

בשעריך תאכלנו, “you may eat it inside your gates;” a reference to the priest who may eat it outside the Temple.
הטמא והטהור. “the ritually impure together with the ritually pure,” an exclamation, referring to the word תאכלנו, “you may eat it,” telling the priest that even if he is in a state of ritual impurity he is allowed to consume this animal. If the meat of the animal is ritually impure however, eating it is forbidden on pain of the karet penalty (Ibn Ezra).