Leviticus 21:8

8 And thou shalt hallow him; he offers the gifts of the Lord your God: he shall be holy, for I the Lord that sanctify them holy.

Leviticus 21:8 Meaning and Commentary

Leviticus 21:8

Thou shalt sanctify him therefore
In thought and word, as Aben Ezra, by thinking and speaking well of him; should esteem and reckon him a holy person, being in a sacred office, and honour him as such; and do all that can be done to preserve him from unholiness and impurity, and particularly from marrying with improper and unsuitable persons, such as would bring a scandal on him and his sacred office: this seems to be spoken to Moses, and so to the civil magistrate in succession, who were not to suffer such marriages to take place in the priesthood; and were not only to persuade from it, but to exercise their authority, and oblige them to put away such wives, and if they refused, to use severity; so Jarchi,

``"thou shalt sanctify him", whether he will or not; if he will not put her away, beat him and chastise him until he does put "her away",''
see ( Ezra 2:62 ) ; for he offereth the bread of the Lord;
meaning not the shewbread he set in order before the Lord every week, but the various gift and sacrifices which were offered to God by him, and were acceptable to him as his food; and therefore he ought to be holy that drew nigh to God, and was employed in such service, see ( Leviticus 21:6 ) ; he shall be holy unto thee;
in thy account and estimation, and for thy service to offer holy sacrifices, and therefore should be careful of his holiness to preserve it: for I the Lord, which sanctify you, [am] holy;
in his nature, works, and ways, and who had separated them from all other people to be a holy people to him, and therefore they that ministered in holy things for them should be holy likewise.

Leviticus 21:8 In-Context

6 They shall be holy to their God, and they shall not profane the name of their God; for they offer the sacrifices of the Lord as the gifts of their God, and they shall be holy.
7 They shall not take a woman who is a harlot and profaned, or a woman put away from her husband; for he is holy to the Lord his God.
8 And thou shalt hallow him; he offers the gifts of the Lord your God: he shall be holy, for I the Lord that sanctify them holy.
9 And if the daughter of a priest should be profaned to go a whoring, she profanes the name of her father: she shall be burnt with fire.
10 And the priest that is chief among his brethren, the oil having been poured upon the head of the anointed one, and he having been consecrated to put on the garments, shall not take the mitre off his head, and shall not rend his garments:

The Brenton translation of the Septuagint is in the public domain.