2 Chronicles 13:10

But as for us, Jehovah is our God, and we have not forsaken him; and we have priests ministering unto Jehovah, the sons of Aaron, and the Levites in their work:

Exodus 19:5-6

Now therefore, if ye will obey my voice indeed, and keep my covenant, then ye shall be mine own possession from among all peoples: for all the earth is mine:

Exodus 29:1-37

And this is the thing that thou shalt do unto them to hallow them, to minister unto me in the priest's office: take one young bullock and two rams without blemish,

Numbers 16:40

to be a memorial unto the children of Israel, to the end that no stranger, that is not of the seed of Aaron, come near to burn incense before Jehovah; that he be not as Korah, and as his company: as Jehovah spake unto him by Moses.

Numbers 18:1-7

And Jehovah said unto Aaron, Thou and thy sons and thy fathers 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, out of all the tribes of Israel, such as set their hearts to seek Jehovah, the God of Israel, came to Jerusalem to sacrifice unto 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 hear 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, out of all the tribes of Israel, such as set their hearts to seek Jehovah, the God of Israel, came to Jerusalem to sacrifice unto Jehovah, the God of their fathers.
Exodus 19:5
Now therefore, if ye will obey my voice indeed, and keep my covenant, then ye shall be mine own possession from among all 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 hear 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 that thou shalt do unto them to hallow them, to minister unto me in the priest's office: take one young bullock and two rams without blemish,
Numbers 16:40
to be a memorial unto the children of Israel, to the end that no stranger, that is not of the seed of Aaron, come near to burn incense before Jehovah; that he be not as Korah, and as his company: as Jehovah spake unto him by Moses.
Numbers 18:1
And Jehovah said unto Aaron, Thou and thy sons and thy fathers house with thee shall bear the iniquity of the sanctuary; and thou and thy sons with thee shall bear the iniquity of your priesthood.

American Standard Version Public Domain