His food — His portion, the means of his subsistence. This may be added, to signify why there was no greater nor longer a penalty put upon the priests than upon the people in the same case, because his necessity craved some mitigation: tho' otherwise the priests being more sacred persons, deserved a greater punishment.
Related Commentaries of Leviticus 22:7
Leviticus 22:7
7 And when the sun is down, he shall be clean, and shall afterward eat of the holy things; because it is his food.