Leviticus 16:1

Then the Lord spoke to Moses after the death of the two sons of Aaron who had died when they [irreverently] approached the presence of the Lord.

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.

Treasury of Scripture Knowledge

Summary

And the LORD spake unto Moses after the death of the two sons of Aaron, when they offered before the LORD, and died;

General references

Bible References

General references

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.