2 Chronicles

And ye shall keep it up until the fourteenth day of the same month: and the whole assembly of the congregation of Israel shall kill it in the evening.

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.

The fourteenth day of the second month at even they shall keep it, and eat it with unleavened bread and bitter herbs.

And said unto them, Ye are the chief of the fathers of the Levites: sanctify yourselves, both ye and your brethren, that ye may bring up the ark of the Lord God of Israel unto the place that I have prepared for it.

So kill the passover, and sanctify yourselves, and prepare your brethren, that they may do according to the word of the Lord by the hand of Moses.