And all the males among the priests shall eat thereof,.... As of the meat offerings, Leviticus 6:18 and this shows that not the single priest that offered only ate of it, Leviticus 6:26 but his male children, and not those only, but those of other priests then upon duty, or in the court:
it is most holy; See Gill on Leviticus 6:25.

The flesh of the sin-offering was to be eaten after it had been boiled, like the meat-offering (Leviticus 6:16 and Leviticus 6:18), by the males among the priests alone. But this only applied to the sin-offerings the laity (Leviticus 4:22-5:13). The flesh of the sin-offerings for the high priest and the whole congregation (Leviticus 4:1-21), the blood of which was brought into the tabernacle "to make atonement in the sanctuary," i.e., that the expiation with the blood might be completed there, was not to be eaten, but to be burned with fire (Leviticus 4:12, Leviticus 4:21). - On the signification of this act of eating the flesh of the sin-offering, see at Leviticus 10:17.