https://www.btstories.com/unholy-fire/
God gave exact instructions to the people of Israel for how they were to worship him. Aaron, the brother of Moses, was chosen to be the high priest, and his sons were to serve with him. When Aaron would eventually die, they would replace him as high priest.
The congregation gathered at the Tabernacle for the ordination of these men. Moses anointed them with oil and made sacrifices to the Lord. He told Aaron and his sons that their ordination would last for seven days, and they were not to leave the Tabernacle until it was over.
