Jamieson, Fausset and Brown on 1 Peter 2:23

23. Servants are apt to "answer again" (Tit 2:9). Threats of divine judgment against oppressors are often used by those who have no other arms, as for instance, slaves. Christ, who as Lord could have threatened with truth, never did so.

committed himself--or His cause, as man in His suffering. Compare the type, Jr 11:20. In this Peter seems to have before his mind Is 53:8. Compare Ro 12:19, on our corresponding duty. Leave your case in His hands, not desiring to make Him executioner of your revenge, but rather praying for enemies. God's righteous judgment gives tranquillity and consolation to the oppressed.