Deuteronomy 15:22

you may eat it in your cities; he who is unclean, (so) that he may not approach to holy things, and he who being clean may approach the holy, may alike (eat), as the flesh of the antelope or hart.

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].

ritually impure and ritually pure refers to you may eat it. The heh in both words carries the vocative meaning, as if to say, “you, whether ritually impure or ritually pure”. In other words, he is permitted to eat it whether he is ritually pure or not. This is mentioned because normally someone who eats holy meat while ritually impure incurs the penalty of karet. Since the previous passage contained the law of “annually” [15: 20], Scripture now mentions the laws of “three times a year” [: 16]. Another connection is that a firstling must be eaten in the Sanctuary, and likewise the Paschal sacrifice may only be eaten during the existence of the Sanctuary, and not outside of it.