Charles Ellicott Commentary 2 Peter 3:3

"knowing this first, that in the last days mockers shall come with mockery, walking after their own lusts," — 2 Peter 3:3 (ASV)

SECOND PREDICTION: Scoffers shall throw doubt on Christ’s return.

(3) In the last days.—Compare 1 Peter 1:20, Hebrews 1:2, and the parallel passage to this, Jude 1:18. “Know this first, children, that there shall come in the last days scoffers, walking after their own lusts” is quoted in a homily attributed on doubtful authority to Hippolytus (see above on 2 Peter 2:1).

Scoffers.—The best authorities add “in scoffing,” intensifying the meaning by repetition (as in Ephesians 1:3, Revelation 14:2). There are other repetitions of this kind in the New Testament, which have been rendered by strengthening the verb in some other way (John 3:29; Acts 4:17; Acts 5:28; James 5:17).