Said R’ Yehudah: Ben Buchri testified in Yavneh that any Kohen who contributes [the half shekel] has not sinned. Rabban Yochanan ben Zakkai replied to Ben Buchri: It is not so! Rather, any Kohen who does not contribute [the half shekel] has sinned; but the Kohanim interpret the following verse for their own benefit: Every meal-offering of a Kohen shall be entirely burnt; it may not be eaten (Leviticus 6:16). [If] the Omer-offering, the Two Loaves, and the Panim Bread are ours, how may they be eaten?