Leviticus 10
King James Version
10 And Nadab and Abihu, the sons of Aaron, took either of them his censer, and put fire therein, and put incense thereon, and offered strange fire before the Lord, which he commanded them not.
2 And there went out fire from the Lord, and devoured them, and they died before the Lord.
3 Then Moses said unto Aaron, This is it that the Lord spake, saying, I will be sanctified in them that come nigh me, and before all the people I will be glorified. And Aaron held his peace.
Numbers 3
King James Version
3 These also are the generations of Aaron and Moses in the day that the Lord spake with Moses in mount Sinai.
2 And these are the names of the sons of Aaron; Nadab the firstborn, and Abihu, Eleazar, and Ithamar.
3 These are the names of the sons of Aaron, the priests which were anointed, whom he consecrated to minister in the priest's office.
4 And Nadab and Abihu died before the Lord, when they offered strange fire before the Lord, in the wilderness of Sinai, and they had no children: and Eleazar and Ithamar ministered in the priest's office in the sight of Aaron their father.
Numbers 26:61
King James Version
61 And Nadab and Abihu died, when they offered strange fire before the Lord.
Now Nadab and Abihu, the sons of Aaron, each took his censer and put fire in it and laid incense on it and offered
unauthorized fire before the LORD, which he had not commanded them. And fire came out from before the LORD and consumed them, and they died before the LORD. (Lev. 10:1–2)
https://www.thegospelcoalition.org/article/two-priests-strange-fire-holy-god/
"The Hebrew word translated “strange” means “unauthorized, foreign, or profane.” God not only rejected their sacrifice; He found it so offensive that He consumed the two men with fire. "
https://www.gotquestions.org/strange-fire.html
https://www.jstor.org/stable/3265571
"It could mean “strange,” as in something abhorrent or loathsome. For instance, in
Job 19:[17] we read, “My breath is strange (
zar) to my wife, and I am a stench to the children of my own mother.” "
https://blog.logos.com/strange-fire-in-leviticus-10-and-why-it-earned-a-death-sentence/
Is it possible they were offering fire from false gods source of fire? what you all think?