Tosefta zu Wajikra 4:24
וְסָמַ֤ךְ יָדוֹ֙ עַל־רֹ֣אשׁ הַשָּׂעִ֔יר וְשָׁחַ֣ט אֹת֔וֹ בִּמְק֛וֹם אֲשֶׁר־יִשְׁחַ֥ט אֶת־הָעֹלָ֖ה לִפְנֵ֣י יְהוָ֑ה חַטָּ֖את הֽוּא׃
Und lege seine Hand auf den Kopf des Bockes und schlachte ihn an dem Orte, wo man das Ganzopfer schlachtet vor dem Herrn; ein Sühnopfer ist es.
Tosefta Demai
Similarly, we do not give the priestly portion [to anyone] except to a Kohen who is a chaver, and that way we do not pay the principal and a fifth (see Lev. 4:24) except to a Kohen who is a chaver. Where a [Kohen who is an] am ha'aretz eats the priestly portion, he [must] pay the principal and a fifth to a Kohen who is a chaver, and the chaver takes Demai [as a gift] to him and thereby appeases the am ha'aretz [by offsetting the penalty].
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