2 Chronicles 29:34

But the priests were too few, so that they could not skin all the burnt offerings. And their brothers the Levites helped them until the work was ended, and until the priests had sanctified themselves. For the Levites were more upright of heart to make themselves pure than the priests.

2 Chronicles 30:3

For they could not keep it at that time, because the priests had not made themselves pure enough, nor had the people gathered to Jerusalem.

2 Chronicles 35:11

And they killed the passover lamb, and the priests sprinkled from their hands, and the Levites skinned them.

Numbers 8:15

And after that the Levites shall go in to do the service of the tabernacle of the congregation. And you shall purify them and offer them for a wave offering.

Numbers 8:19

And I have given the Levites as a gift to Aaron and to his sons from among the sons of Israel, to do the service of the sons of Israel in the tabernacle of the congregation, and to make an atonement for the sons of Israel, so that there may be no plague among the sons of Israel when the sons of Israel come near the sanctuary.

Numbers 18:3

And they shall keep your charge and the charge of all the tabernacle. Only they shall not come near the vessels of the sanctuary and the altar, so that neither they nor you also may die.

Numbers 18:6-7

And I, behold, I have taken your brothers the Levites from among the sons of Israel. They are given to you as a gift by Jehovah, to do the service of the tabernacle of the congregation.

1 Chronicles 29:17

I know also, my God, that You try the heart, and have pleasure in uprightness. I, in the uprightness of my heart, have willingly offered all these things. And now I have seen with joy Your people who are present here to offer willingly to You.

2 Chronicles 29:5

And he said to them, Hear me, Levites, now sanctify yourselves and sanctify the house of Jehovah, the God of your fathers, and carry out the filthiness out of the holy place.

2 Chronicles 30:16-17

And they stood in their place in their manner, according to the Law of Moses the man of God. The priests sprinkled the blood from the hand of the Levites.

Psalm 7:10

My defense is from God, who saves the upright in heart.

Psalm 26:6

I will wash my hands in innocency; so I will go around Your altar, O Jehovah,

Psalm 94:15

But judgment shall return to righteousness; and all the upright in heart shall follow it.

Treasury of Scripture Knowledge

Summary

But the priests were too few, so that they could not flay all the burnt offerings: wherefore their brethren the Levites did help them, till the work was ended, and until the other priests had sanctified themselves: for the Levites were more upright in heart to sanctify themselves than the priests.

For the levites

Bible References

Their brethren

2 Chronicles 35:11
And they killed the passover lamb, and the priests sprinkled from their hands, and the Levites skinned them.
Numbers 8:15
And after that the Levites shall go in to do the service of the tabernacle of the congregation. And you shall purify them and offer them for a wave offering.
Numbers 18:3
And they shall keep your charge and the charge of all the tabernacle. Only they shall not come near the vessels of the sanctuary and the altar, so that neither they nor you also may die.

For the levites

2 Chronicles 30:3
For they could not keep it at that time, because the priests had not made themselves pure enough, nor had the people gathered to Jerusalem.

Upright

1 Chronicles 29:17
I know also, my God, that You try the heart, and have pleasure in uprightness. I, in the uprightness of my heart, have willingly offered all these things. And now I have seen with joy Your people who are present here to offer willingly to You.
Psalm 7:10
My defense is from God, who saves the upright in heart.
Psalm 26:6
I will wash my hands in innocency; so I will go around Your altar, O Jehovah,
Psalm 94:15
But judgment shall return to righteousness; and all the upright in heart shall follow it.