Leviticus 22:16

or suffer them to bear the iniquity of trespass, load themselves with the crime of the guilt in permitting such a profanation on the part of unauthorized people, when they eat their holy things; for I, the Lord, do sanctify them. So the priests were charged with the supervision of these matters, in order to keep the sanctified things from profanation, just as the pastors of the Christian Church should carry out the function of watchmen in warning the people entrusted to them by the Lord of the Church against all transgressions of God's holy Law.