The Feast of Unleavened Bread — 2 Chronicles 30:10–17

So the posts passed from city to city through the country of Ephraim and Manasseh, even unto Zebulun: but they laughed them to scorn, and mocked them. Nevertheless certain men of Asher and Manasseh and of Zebulun humbled themselves, and came to Jerusalem. Also upon Judah came the hand of God to give them one heart, to do the commandment of the king and of the princes by the word of Jehovah.

And there assembled at Jerusalem much people to keep the feast of unleavened bread in the second month, a very great assembly. And they arose and took away the altars that were in Jerusalem, and all the altars for incense took they away, and cast them into the brook Kidron.

Then they killed the passover on the fourteenth day of the second month: and the priests and the Levites were ashamed, and sanctified themselves, and brought burnt-offerings into the house of Jehovah. And they stood in their place after their order, according to the law of Moses the man of God: the priests sprinkled the blood which they received of the hand of the Levites. For there were many in the assembly that had not sanctified themselves: therefore the Levites had the charge of killing the passovers for every one that was not clean, to sanctify them unto Jehovah.