Numbers 9:7

and those men say unto him, 'We are defiled by the body of a man; why are we withheld so as not to bring near the offering of Jehovah in its appointed season, in the midst of the sons of Israel?'

Exodus 12:27

that ye have said, A sacrifice of passover it is to Jehovah, who passed over the houses of the sons of Israel in Egypt, in His smiting the Egyptians, and our houses He delivered.'

Numbers 9:2

'Also, the sons of Israel prepare the passover in its appointed season;

Deuteronomy 16:2

and thou hast sacrificed a passover to Jehovah thy God, of the flock, and of the herd, in the place which Jehovah doth choose to cause His name to tabernacle there.

2 Chronicles 30:17-19

for many are in the assembly who have not sanctified themselves, and the Levites are over the slaughtering of the passover-offerings for every one not clean, to sanctify him to Jehovah:

1 Corinthians 5:7-8

cleanse out, therefore, the old leaven, that ye may be a new lump, according as ye are unleavened, for also our passover for us was 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
'Also, the sons of Israel prepare the passover in its appointed season;
Exodus 12:27
that ye have said, A sacrifice of passover it is to Jehovah, who passed over the houses of the sons of Israel in Egypt, in His smiting the Egyptians, and our houses He delivered.'
Deuteronomy 16:2
and thou hast sacrificed a passover to Jehovah thy God, of the flock, and of the herd, in the place which Jehovah doth choose to cause His name to tabernacle there.
2 Chronicles 30:17
for many are in the assembly who have not sanctified themselves, and the Levites are over the slaughtering of the passover-offerings for every one not clean, to sanctify him to Jehovah:
1 Corinthians 5:7
cleanse out, therefore, the old leaven, that ye may be a new lump, according as ye are unleavened, for also our passover for us was sacrificed -- Christ,

General references

Leviticus 23:5
in the first month, on the fourteenth of the month, between the evenings, is the passover to Jehovah;
Haggai 2:13
And Haggai saith, 'If the unclean of body doth come against any of these, is it unclean?' And the priests answer and say, 'It is unclean.'