1 Chronicles 23:13 -

The sons of Amram . From Amram, the first-mentioned son of Kohath, come the two great names of Aaron and Moses ( Exodus 6:20 ). Aaron was separated,… and his sons for ever . This statement must be read, both with 1 Chronicles 23:3 —into the number of Levites mentioned in which Aaron and his sons do not count—and with 1 Chronicles 23:14 , which implies that Moses and his sons did count into that number. The sons of Aaron are dealt with in 1 Chronicles 24:1-19 , infra. That he should sanctify the most holy things . The Hebrew text renders it doubtful whether the rendering here should not rather be, "Aaron was separated to sanctify him as most holy," etc. If it be so, this is the only place where the forcible term, "holy of holies" (most holy), is used of Aaron. The duties of the priest are described as threefold, in this place, viz.: "to burn incense before the Lord,"—this will carry the idea of making atonement; "to minister to God," on behalf of man, ― this will be one part of the work of a mediator; and "to bless in the Name of God,"—this will fulfil the remaining part. For ever. The proviso may, no doubt, include reference to the "ever-living High Priest." The threefold summary of solemn and beneficent duties receives ample illustration from many passages, and in special connection with the names of Aaron and his sons ( Exodus 28:1 , Exodus 28:38 , Exodus 28:43 ; Exodus 29:1 , Exodus 29:35 , Exodus 29:45 , Exodus 30:7-10 ; Numbers 6:22-27 ).