Numbers 9:7
And those men said to him, "We are unclean through touching a dead body. Why are we kept from bringing the LORD's offering at its appointed time among the people of Israel?"
Exodus 12:27
you shall say, 'It is the sacrifice of the LORD's Passover, for he passed over the houses of the people of Israel in Egypt, when he struck the Egyptians but spared our houses.'" And the people bowed their heads and worshiped.
Numbers 9:2
"Let the people of Israel keep the Passover at its appointed time.
Deuteronomy 16:2
And you shall offer the Passover sacrifice to the LORD your God, from the flock or the herd, at the place that the LORD will choose, to make his name dwell there.
2 Chronicles 30:17-19
For there were many in the assembly who had not consecrated themselves. Therefore the Levites had to slaughter the Passover lamb for everyone who was not clean, to consecrate it to the LORD.
1 Corinthians 5:7-8
Cleanse out the old leaven that you may be a new lump, as you really are unleavened. For Christ, our Passover lamb, has been sacrificed.