Thomas Coke Commentary on the Holy Bible - 2 Peter 2:4
2 Peter 2:4. For if God spared not the angels— Some think the sense is suspended till we come to 2Pe 2:9 and the reddition to be looked for there; that is, If God spared not the angels who sinned, &c. the Lord also knoweth how to deliver the godly, &c. This may possibly be the connection; or, if the words ει γαρ are taken affirmatively for since—inasmuch as—there will be no occasion for a reddition afterwards. From this verse to the end of 2Pe 2:8 are contained three remarkable... read more
Coffman Commentaries on the Bible - 2 Peter 2:4
For if God spared not angels when they sinned, but cast them down to hell, and committed them to pits of darkness, to be reserved unto judgment;Peter with this verse cited some historical examples of God's judgment and condemnation of the wicked (noting also that the righteous were spared), these being: (1) the example of the sinning angels; (2) the case of Noah and his generation; (3) the example of Sodom and Gomorrah; and (4) the deliverance of Lot. It is an unqualified mystery to this writer... read more