Cross reference
2 Chronicles 30:3
3 It was not possible to keep it at that time, because not enough priests had made themselves holy, and the people had not come together in Jerusalem.
2 Chronicles 29:34
34 There were not enough priests for the work of cutting up all the burned offerings; so their brothers the Levites gave them help till the work was done and the priests had made themselves holy: for the Levites were more upright in heart to make themselves holy than the priests.
Exodus 12:6
6 Keep it till the fourteenth day of the same month, when everyone who is of the children of Israel is to put it to death between sundown and dark.
Exodus 12:18
18 In the first month, from the evening of the fourteenth day, let your food be unleavened bread till the evening of the twenty-first day of the month.
2 Chronicles 29:17
17 On the first day of the first month the work of making the house holy was started, and on the eighth day they came to the covered way of the Lord; in eight days they made the Lord's house holy, and on the sixteenth day of the first month the work was done.