Peter could have chosen to stop his quotation after the first part of 1 Peter 2:22, namely, after “he committed no sin,” and thus emphasize the Isaianic gospel that Jesus suffered for us. But the point Peter wants to make is that Jesus Christ has set the example that the Christian is to follow in the face of unjust suffering. So the fact that Jesus did not scold or ridicule or threaten his oppressors as they wronged him becomes important to the argument of example. More, the word translated as “deceit” is the same word as appeared in 1 Peter 2:1: Christian love (1 Peter 1:22) involves putting away from one’s heart all “malice” (wishing another bad), and hence also from one’s mouth.
22 He committed no sin, neither was deceit found in his mouth.