Treasury of Scripture Knowledge

Summary

But the man that is clean, and is not in a journey, and forbeareth to keep the passover, even the same soul shall be cut off from among his people: because he brought not the offering of the LORD in his appointed season, that man shall bear his sin.

Because

Bible References

Forbeareth

Numbers 15:30
Any who sin deliberately, natives or foreigners, are guilty of treating Jehovah with contempt. They shall be put to death.
Numbers 19:13
Those who touch a corpse and do not purify themselves remain unclean. This is because the water for purification has not been thrown over them. They defile Jehovah's tent, and they will no longer be considered God's people.
Genesis 17:14
Any male not circumcised in the flesh will be cut off from his people. He has broken my covenant.
Exodus 12:15
You will eat unleavened bread for seven days. The first day you shall remove leaven from your houses. Whoever eats anything leavened from the first day until the seventh day will be cut off from Israel.
Leviticus 17:4
is guilty of bloodshed. He has shed blood and must be excluded from the people. Bring the animal to the entrance of the Tent of Meeting. Offer it to Jehovah in front of the Jehovah's Tent.
Hebrews 2:3
How shall we escape, if we neglect such a great salvation? It was first presented by the Lord and was confirmed to us by those who heard him.
Hebrews 6:6
if they shall fall away, it is impossible to renew them again to repentance. This is because they personally impale the Son of God again, and expose him to public shame.
Hebrews 10:26
If we continue to (practice) (deliberately persist in) sin willfully after we have received the knowledge of the truth, there remains no more sacrifice for sins.
Hebrews 12:25
Be careful, then, and do not refuse to hear him who speaks. Those who refused to hear the one who gave the divine message on earth did not escape. How much less shall we escape then, if we turn away from the one who speaks from heaven!

Because

Numbers 9:2
The Israelites should celebrate the Passover at the same time every year.