Leviticus 10:1 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.
[Patriarchs & Prophets pp 259>260] After the dedication of the tabernacle, the priests were consecrated to their sacred office. These services occupied seven days, each marked by special ceremonies. On the eighth day they entered upon their ministration. Assisted by his sons, Aaron offered the sacrifices that God required, and he lifted up his hands and blessed the people. All had been done as God commanded, and He accepted the sacrifice, and revealed His glory in a remarkable manner; fire came from the Lord and consumed the offering upon the altar. The people looked upon this wonderful manifestation of divine power with awe and intense interest. They saw in it a token of God's glory and favor, and they raised a universal shout of praise and adoration and fell on their faces as if in the immediate presence of Jehovah.
But soon afterward a sudden and terrible calamity fell upon the family of the high priest. At the hour of worship, as the prayers and praise of the people were ascending to God, two of the sons of Aaron took each his censer and burned fragrant incense thereon, to rise as a sweet odor before the Lord. But they transgressed His command by the use of “strange fire.” For burning the incense they took common instead of the sacred fire which God Himself had kindled, and which He had commanded to be used for this purpose. For this sin a fire went out from the Lord and devoured them in the sight of the people.
Next to Moses and Aaron, Nadab and Abihu had stood highest in Israel. They had been especially honored by the Lord, having been permitted with the seventy elders to behold His glory in the mount. But their transgression was not therefore to be excused or lightly regarded. All this rendered their sin more grievous. Because men have received great light, because they have, like the princes of Israel, ascended to the mount, and been privileged to have communion with God, and to dwell in the light of His glory, let them not flatter themselves that they can afterward sin with impunity, that because they have been thus honored, God will not be strict to punish their iniquity. This is a fatal deception.
Luke 12:47 And that servant, which knew his lord's will, and prepared not himself, neither did according to his will, shall be beaten with many stripes. 48 For unto whomsoever much is given, of him shall be much required: and to whom men have committed much, of him they will ask the more.
May God add his blessing to the study of His word. "Good night" and God bless!