I will sanctify also both Aaron and his sons. — Something beyond the formal consecration seems to be intended. God will continually sanctify the Levitical priesthood by the presence of His Holy Spirit with them, in their ministerial acts, and even in their daily walk, if they will seek to serve Him.
Related Commentaries of Exodus 29:44
Exodus 29:44
44 And I will sanctify the tabernacle of the congregation, and the altar: I will sanctify also both Aaron and his sons, to minister to me in the priest's office.