2 Chronicles 30:3
but they were not able to make it at that time, for the priests had not consecrated themselves {in sufficient numbers}, and the people had not been assembled in Jerusalem--
2 Chronicles 29:34
But the priests were too few, and they were not able to offer all the burnt offerings, so their brothers, the Levites, strengthened them to finish the work, and until the [rest of] the priests consecrated themselves. (For the Levites [were] {more conscientious} to sanctify themselves than the priests.)
Exodus 12:6
"{You will keep it} until the fourteenth day of this month, and all the assembly of the community of Israel will slaughter it {at twilight}.
Exodus 12:18
On the first [day], on the fourteenth day of the month, in the evening, you will eat unleavened bread until the evening of the twenty-first day of the month.
2 Chronicles 29:17
And they began to sanctify themselves on the first day of the first month. And on the eighth day of the month they came to the portico of Yahweh. And they sanctified the house of Yahweh for eight days, and on the sixteenth day of the first month they finished.