Charles Ellicott Commentary Leviticus 21:24

"So Moses spake unto Aaron, and to his sons, and unto all the children of Israel." — Leviticus 21:24 (ASV)

And unto all the children of Israel. —These regulations about the conduct and qualifications of the priesthood, which God imparted to Moses, Moses not only communicated to the high priest and his sons, the priests, but also to the representatives of the people, who, as the community, had the supervision of the priests. The sacerdotal laws were administered and enforced by the elders or Sanhedrin, who were the representatives of the people. (See Leviticus 21:21.)