Albert Barnes Commentary Leviticus 4:27

"And if any one of the common people sin unwittingly, in doing any of the things which Jehovah hath commanded not to be done, and be guilty;" — Leviticus 4:27 (ASV)

The common people - literally, as in the margin, “the people of the land.” Compare Leviticus 20:2, Leviticus 20:4; 2 Kings 11:18. It was the ordinary designation of the people, as distinguished from the priests and the rulers.