2 Chronicles 11:16, 17
Those from every tribe of Israel who had set their hearts to seek the LORD their God followed the Levites to Jerusalem to sacrifice to the LORD, the God of their fathers. . . .

Exodus 19:5, 6
Now if you will indeed obey My voice and keep My covenant, you will be My treasured possession out of all the nations--for the whole earth is Mine. . . .

Zechariah 13:9
This third I will bring through the fire; I will refine them like silver and test them like gold. They will call on My name, and I will answer them. I will say, 'They are My people, ' and they will say, 'The LORD is our God.'"

the priests

Exodus 29:1
Now this is what you are to do to consecrate them to serve Me as priests: Take a young bull and two rams without blemish,

Numbers 16:40
just as the LORD commanded him through Moses. This was to be a reminder for the Israelites that no outsider who is not a descendant of Aaron should approach to offer incense before the LORD, lest he become like Korah and his followers.

Numbers 18:1-7
The LORD said to Aaron, "You, your sons, and your father's house must bear the iniquity against the sanctuary. And you and your sons alone must bear the iniquity against the priesthood. . . .