2 Chronicles 30:3
For they could not keep it at that time, because the priests had not hallowed themselves in sufficient number, neither had the people been gathered together to Jerusalem.
2 Chronicles 29:34
Only the priests were too few, and they could not flay all the burnt-offerings; therefore their brethren the Levites helped them, until the work was ended, and until the priests had hallowed themselves; for the Levites were more upright in heart to hallow themselves than the priests.
Exodus 12:6
And ye shall keep it until the fourteenth day of this month; and the whole congregation of the assembly of Israel shall kill it between the two evenings.
Exodus 12:18
In the first month, on the fourteenth day of the month, in the evening, ye shall eat unleavened bread until the one and twentieth day of the month in the evening.
2 Chronicles 29:17
And they began on the first of the first month to hallow, and on the eighth day of the month they came to the porch of Jehovah; and they hallowed the house of Jehovah eight days; and on the sixteenth day of the first month they made an end.