2 Chronicles 13:10

But as for us, Jehovah is our God, and we have not forsaken him; and the priests that serve Jehovah are the sons of Aaron, and the Levites are at their work:

Exodus 19:5-6

And now, if ye will hearken to my voice indeed and keep my covenant, then shall ye be my own possession out of all the peoples for all the earth is mine --

Exodus 29:1-37

And this is the thing which thou shalt do to them to hallow them, that they may serve me as priests: take one young bullock, and two rams without blemish,

Numbers 16:40

as a memorial to the children of Israel, that no stranger who is not of the seed of Aaron come near to burn incense before Jehovah, that he be not as Korah, and as his band, as Jehovah had said to him through Moses.

Numbers 18:1-7

And Jehovah said to Aaron, Thou and thy sons and thy father's house with thee shall bear the iniquity of the sanctuary; and thou and thy sons with thee shall bear the iniquity of your priesthood.

2 Chronicles 11:16-17

And after them, those out of all the tribes of Israel that set their heart to seek Jehovah the God of Israel came to Jerusalem, to sacrifice to Jehovah the God of their fathers.

Zechariah 13:9

And I will bring the third part into the fire, and will refine them as silver is refined, and will try them as gold is tried. They shall call on my name, and I will answer them: I will say, It is my people; and they shall say, Jehovah is my God.

Treasury of Scripture Knowledge

Summary

But as for us, the LORD is our God, and we have not forsaken him; and the priests, which minister unto the LORD, are the sons of Aaron, and the Levites wait upon their business:

Bible References

The lord

2 Chronicles 11:16
And after them, those out of all the tribes of Israel that set their heart to seek Jehovah the God of Israel came to Jerusalem, to sacrifice to Jehovah the God of their fathers.
Exodus 19:5
And now, if ye will hearken to my voice indeed and keep my covenant, then shall ye be my own possession out of all the peoples for all the earth is mine --
Zechariah 13:9
And I will bring the third part into the fire, and will refine them as silver is refined, and will try them as gold is tried. They shall call on my name, and I will answer them: I will say, It is my people; and they shall say, Jehovah is my God.

The priests

Exodus 29:1
And this is the thing which thou shalt do to them to hallow them, that they may serve me as priests: take one young bullock, and two rams without blemish,
Numbers 16:40
as a memorial to the children of Israel, that no stranger who is not of the seed of Aaron come near to burn incense before Jehovah, that he be not as Korah, and as his band, as Jehovah had said to him through Moses.
Numbers 18:1
And Jehovah said to Aaron, Thou and thy sons and thy father's house with thee shall bear the iniquity of the sanctuary; and thou and thy sons with thee shall bear the iniquity of your priesthood.