Isaiah 50:8-9

The Servant could, if He chose to do so, stand up in court and declare His righteousness. No one, such as a prosecuting attorney, could condemn Him by showing Him to be wicked (cf. John 18:38). God would stand near Him as His defense attorney and would vindicate Him (cf. 1 John 2:1-2). The beginning of Jesus’ vindication was His resurrection (cf. Acts 2:23-24; Acts 3:15; Acts 13:29-30).

The end of those who falsely accused the Servant, would be a slow but inevitable wasting away and disintegration, rather than cataclysmic destruction. God did not vindicate Messiah by judging His accusers immediately, in some dramatic way that resulted in people connecting their judgment with their antagonism toward Messiah. Rather, He allowed them to continue to live but to experience a decline in their fortunes (cf. Pilate, Herod, the Jewish leaders, the Gentiles).

"The setting of Isaiah 50:8-9 is clearly forensic, and the trials of Jesus in the Gospels make this peculiarly appropriate." [Note: Grogan, p. 290.]