Numbers 9:7
And those men said to him, We are defiled by the dead body of a man: why are we kept back, that we may not offer an offering of the LORD in its appointed season among the children of Israel?
Exodus 12:27
That ye shall say, It is the sacrifice of the LORD'S passover, 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 the head and worshiped.
Numbers 9:2
Let the children of Israel also keep the passover at its appointed season.
Deuteronomy 16:2
Thou shalt therefore sacrifice the passover to the LORD thy God, of the flock and the herd, in the place which the LORD shall choose to place his name there.
2 Chronicles 30:17-19
For there were many in the congregation that were not sanctified: therefore the Levites had the charge of the killing of the passovers for every one that was not clean, to sanctify them to the LORD.
1 Corinthians 5:7-8
Cleanse out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us: