For [there were] many in the congregation that were not sanctified: therefore the Levites had the charge of the killing of the passovers for every one [that was] not clean, to sanctify [them] unto the LORD.
Berean Study Bible (BSB) - 2 Chronicles 30:17 >Since there were many in the assembly who had not consecrated themselves, the Levites were in charge of slaughtering the Passover lambs for every unclean person to consecrate the lambs to the LORD.