Numbers 9:7

Then said those men unto him, We, are unclean by a dead person, - wherefore should we become of less esteem for want of offering the oblation of Yahweh in its appointed season, in the midst of the sons of Israel?

Exodus 12:27

Then shall ye say - A passover sacrifice, it is to Yahweh, who passed-over the houses of the sons of Israel, in Egypt, when he plagued the Egyptians but our houses, he delivered. Then did the people bend their heads and bow themselves down.

Numbers 9:2

Let the sons of Israel therefore, keep the passover in its appointed season:

Deuteronomy 16:2

therefore shalt thou sacrifice a passover unto Yahweh thy God of flock or herd, - in the place which Yahweh shall choose to make a habitation for his name there.

2 Chronicles 30:17-19

For there were many in the convocation, who had not hallowed themselves, - but, the Levites, were over the slaughtering of the passover-lambs, for every one who was, not pure, to hallow him unto Yahweh.

1 Corinthians 5:7-8

Purge ye out the old leaven, that ye may be a new lump, - even as ye are unleavened; for, our passover, hath even been sacrificed - Christ:

Treasury of Scripture Knowledge

Summary

And those men said unto him, We are defiled by the dead body of a man: wherefore are we kept back, that we may not offer an offering of the LORD in his appointed season among the children of Israel?

General references

Bible References

We may not offer

Numbers 9:2
Let the sons of Israel therefore, keep the passover in its appointed season:
Exodus 12:27
Then shall ye say - A passover sacrifice, it is to Yahweh, who passed-over the houses of the sons of Israel, in Egypt, when he plagued the Egyptians but our houses, he delivered. Then did the people bend their heads and bow themselves down.
Deuteronomy 16:2
therefore shalt thou sacrifice a passover unto Yahweh thy God of flock or herd, - in the place which Yahweh shall choose to make a habitation for his name there.
2 Chronicles 30:17
For there were many in the convocation, who had not hallowed themselves, - but, the Levites, were over the slaughtering of the passover-lambs, for every one who was, not pure, to hallow him unto Yahweh.
1 Corinthians 5:7
Purge ye out the old leaven, that ye may be a new lump, - even as ye are unleavened; for, our passover, hath even been sacrificed - Christ:

General references

Leviticus 23:5
In the first month, on the fourteenth of the month, between the evenings, is a Passover unto Yahweh;
Haggai 2:13
Then said Haggai, If one who is defiled for a dead person touch any of these, shall it be defiled? And the priests answered and said, It shall be defiled.