Exo 29:9, Lev 10:12, Num 16:39-40, 18:7 | ESV | STEP | and you shall gird Aaron and his sons with sashes and bind caps on them. And the priesthood shall be theirs by a statute forever . Thus you shall ordain Aaron and his sons .

Exodus 29:9

9 and you shall gird Aaron and his sons with ^asashes and bind caps on them. And ^bthe priesthood shall be theirs by a statute forever. Thus you shall ^cordain Aaron and his sons.

Leviticus 10:12

12 Moses spoke to Aaron and to Eleazar and Ithamar, his surviving sons: “Take the ^dgrain offering that is left of the Lord’s food offerings, and eat it unleavened beside the altar, for ^eit is most holy.

Numbers 16:39-40

39 So Eleazar the priest took the bronze censers, which those who were burned had offered, and they were hammered out as a covering for the altar, 40 to be a reminder to the people of Israel, so ^fthat no outsider, who is not of the descendants of Aaron, should draw near to burn incense before the Lord, lest he become like Korah and his company—as the Lord said to him through Moses.

Numbers 18:7

7 And ^gyou and your sons with you shall guard your priesthood for all that concerns the altar and ^hthat is within the veil; and you shall serve. I give your priesthood as a gift, ^{▼▼Hebrew service of gift} and ^jany outsider who comes near shall be put to death.”