2 Chronicles 13:10
"Now as far as we're concerned, the LORD is our God, and we haven't abandoned him. The descendants of Aaron are ministering to the LORD as priests, and the descendants of Levi continue their work.
Exodus 19:5-6
And now if you carefully obey me and keep my covenant, you are to be my special possession out of all the nations, because the whole earth belongs to me,
Exodus 29:1-37
"This is what you are to do to them in order to consecrate them to serve me as priests: Take a young bull, two rams without blemish,
Numbers 16:40
to serve as a memorial to the Israelis, a reminder that no unauthorized person, who isn't a descendant of Aaron, is to attempt to burn incense in the LORD'S presence, so that he may not become like Korah and his group, just as the LORD had spoken by the authority of Moses.
Numbers 18:1-7
Later, the LORD told Aaron, "You, your sons, and your father's tribe with you are to bear the iniquity of the sanctuary. Also, you and your sons with you are to bear the iniquity of your priesthood.
2 Chronicles 11:16-17
As a result, anyone from all of the tribes of Israel who was determined to seek the LORD God of Israel followed the descendants of Levi to Jerusalem so they could sacrifice to the LORD God of their ancestors,
Zechariah 13:9
And I will bring that surviving third through, testing them as if through fire, purifying them like silver, assaying them like gold. They will call on my name, and I will answer them. I will say, "This is my people,' and they will say, "The LORD is my God.'"