'Confirm' in the Bible

Jesus replied, "If I have said something wrong, confirm what is wrong. But if I spoke correctly, why strike me?"

For I tell you that Christ has become a servant of the circumcised on behalf of God's truth to confirm the promises made to the fathers,

And, after you have suffered for a little while, the God of all grace who called you to his eternal glory in Christ will himself restore, confirm, strengthen, and establish you.