Ezra 6:20

For the priests and the Levites were purified together, all of them pure. And they slaughtered the passover lamb for all the sons of the captivity, and for their brothers the priests, and for themselves.

2 Chronicles 35:11

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

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.

Exodus 12:21

Then Moses called for all the elders of Israel and said to them, Draw out and take a lamb for yourselves according to your families, and kill the passover.

2 Chronicles 30:15-17

And they killed the Passover on the fourteenth of the second month. And the priests and the Levites were ashamed and made themselves pure, and brought in the burnt offerings into the house of Jehovah.

Hebrews 7:27

who does not need, as those high priests, to offer up sacrifice daily, first for his own sins and then for the people's sins. For He did this once for all, when He offered up Himself.

Treasury of Scripture Knowledge

Summary

For the priests and the Levites were purified together, all of them were pure, and killed the passover for all the children of the captivity, and for their brethren the priests, and for themselves.

Bible References

Purified together

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 30:15
And they killed the Passover on the fourteenth of the second month. And the priests and the Levites were ashamed and made themselves pure, and brought in the burnt offerings into the house of Jehovah.

Killed

Exodus 12:21
Then Moses called for all the elders of Israel and said to them, Draw out and take a lamb for yourselves according to your families, and kill the passover.
2 Chronicles 35:11
And they killed the passover lamb, and the priests sprinkled from their hands, and the Levites skinned them.
Hebrews 7:27
who does not need, as those high priests, to offer up sacrifice daily, first for his own sins and then for the people's sins. For He did this once for all, when He offered up Himself.