Exodus 19:21

21And the  Lord said to Moses, “Go down and warn the people, lest they break through to the  Lord a  to look and many of them perish.

Leviticus 10:1-3

The Death of Nadab and Abihu

1Now b  Nadab and Abihu, the sons of Aaron, c  each took his censer and put fire in it and laid incense on it and offered d  unauthorized
Or strange
fire before the  Lord, which he had not commanded them.
2And fire f  came out from before the  Lord and consumed them, and they died before the  Lord. 3Then Moses said to Aaron, “This is what the  Lord has said: ‘Among g  those who are near me h  I will be sanctified, and before all the people I will be glorified.’” i  And Aaron held his peace.

Numbers 4:4-5

4This is the service of the sons of Kohath in the tent of meeting: j  the most holy things. 5When the camp is to set out, Aaron and his sons shall go in and take down k  the veil of the screen and cover l  the ark of the testimony with it.

Numbers 4:15

15And when Aaron and his sons have finished covering the sanctuary and all the furnishings of the sanctuary, as the camp sets out, after that m  the sons of Kohath shall come to carry these, n  but they must not touch the holy things, lest they die. These are the things of the tent of meeting that the sons of Kohath are to carry.

Numbers 4:20

20 o  but they shall not go in to look on the holy things even for a moment, lest they die.”

Deuteronomy 29:29

29“The secret things belong to the  Lord our God, but the things that are revealed belong to us and to our children forever, that we may do all the words of this law.

2 Samuel 6:7

7And the anger of the  Lord was kindled against Uzzah, and p  God struck him down there because of his error, and he died there beside the ark of God.
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