Numbers 9:7
And those men said to him, We are unclean by reason of the dead body of a man: why are we kept back, that we may not present the offering of Jehovah at its set time among the children of Israel?
Exodus 12:27
that ye shall say, It is a sacrifice of passover to Jehovah, who passed over the houses of the children of Israel in Egypt when he smote the Egyptians and delivered our houses. And the people bowed their heads and worshipped.
Numbers 9:2
Let the children of Israel also hold the passover at its set time;
Deuteronomy 16:2
And thou shalt sacrifice the passover to Jehovah thy God, of the flock and of the herd, in the place which Jehovah will choose to cause his name to dwell there.
2 Chronicles 30:17-19
For there were many in the congregation that were not hallowed; therefore the Levites had the charge of the slaughtering of the passover-lambs for every one not clean, to hallow them unto Jehovah.
1 Corinthians 5:7-8
Purge out the old leaven, that ye may be a new lump, according as ye are unleavened. For also our passover, Christ, has been sacrificed;