Leviticus 22:9

Therefore the priests shall observe My ordinance, so that they will not bear sin because of it and die if they profane it; I am the Lord who sanctifies them.

Exodus 28:43

The various articles of clothing shall be on Aaron and on his sons when they enter the Tent of Meeting, or when they approach the altar [of incense] to minister in the Holy Place, so that they do not incur guilt and die. It shall be a statute forever to Aaron and to his descendants after him.

Numbers 18:22

The Israelites shall never again approach the Tent of Meeting [the covered sanctuary, the Holy Place, and the Holy of Holies], or they [who do] will incur sin and die.

Leviticus 10:1-2

Now Nadab and Abihu, the sons of Aaron, took their respective [ceremonial] censers, put fire in them, placed incense on it and offered strange (unauthorized, unacceptable) fire before the Lord, [an act] which He had not commanded them to do.

Leviticus 16:2

The Lord said to Moses,

“Tell Aaron your brother that he must not enter at any time into the Holy Place inside the veil (the Holy of Holies), before the mercy seat which is on the ark, or he will die, for I will appear in the cloud over the mercy seat.

Leviticus 22:16

and so cause them [by neglect of any essential observance] to bear the punishment of guilt when they eat their holy things; for I am the Lord who sanctifies them.’”

Numbers 18:32

You will bear no sin because of it when you have offered the best of it; but you shall not profane the sacred gifts of the children of Israel, or you will die [because of it].’”

Treasury of Scripture Knowledge

Summary

They shall therefore keep mine ordinance, lest they bear sin for it, and die therefore, if they profane it: I the LORD do sanctify them.

General references

Bible References

Bear sin for it

Leviticus 10:1
Now Nadab and Abihu, the sons of Aaron, took their respective [ceremonial] censers, put fire in them, placed incense on it and offered strange (unauthorized, unacceptable) fire before the Lord, [an act] which He had not commanded them to do.
Leviticus 16:2
The Lord said to Moses,

“Tell Aaron your brother that he must not enter at any time into the Holy Place inside the veil (the Holy of Holies), before the mercy seat which is on the ark, or he will die, for I will appear in the cloud over the mercy seat.
Exodus 28:43
The various articles of clothing shall be on Aaron and on his sons when they enter the Tent of Meeting, or when they approach the altar [of incense] to minister in the Holy Place, so that they do not incur guilt and die. It shall be a statute forever to Aaron and to his descendants after him.
Numbers 18:22
The Israelites shall never again approach the Tent of Meeting [the covered sanctuary, the Holy Place, and the Holy of Holies], or they [who do] will incur sin and die.

General references

Leviticus 22:15
The priests shall not profane the holy things the Israelites offer to the Lord,