2 Chronicles 30:17
For there were many in the assembly who had not sanctified themselves. Therefore the Levites had charge of killing the Passovers for everyone who was not clean, to sanctify them to LORD.
2 Chronicles 29:34
But the priests were too few, so that they could not skin all the burnt-offerings. Therefore their brothers the Levites helped them till the work was ended, and until the priests had sanctified themselves. For the Levites were more
Exodus 12:6
And ye shall keep it until the fourteenth day of the same month, and the whole assembly of the congregation of Israel shall kill it at evening.
2 Chronicles 35:3-6
And he said to the Levites who taught all Israel, who were holy to LORD, Put the holy ark in the house which Solomon the son of David king of Israel built. There shall no more be a burden upon your shoulders. Now serve LORD your Go