Aaron's sons, Nadab and Abihu, each took his fire pan, put live coals in it, added incense, and presented it to the LORD. But this fire was not holy, because the LORD had not commanded them to present it.

Suddenly the LORD sent fire, and it burned them to death there in the presence of the LORD.

He said, "Tell your brother Aaron that only at the proper time is he to go behind the curtain into the Most Holy Place, because that is where I appear in a cloud above the lid on the Covenant Box. If he disobeys, he will be killed.

Aaron and his sons must always wear them when they go into the Tent of my presence or approach the altar to serve as priests in the Holy Place, so that they will not be killed for exposing themselves. This is a permanent rule for Aaron and his descendants.

The other Israelites must no longer approach the Tent and in this way bring on themselves the penalty of death.

You will not become guilty when you eat it, as long as you have presented the best of it to the LORD. But be sure not to profane the sacred gifts of the Israelites by eating any of the gifts before the best part is offered; if you do, you will be put to death."