'Confirmed' in the Bible

even as the testimony of Christ was confirmed in you:

Brothers, speaking of human terms, though it is only a man's covenant, yet when it has been confirmed, no one makes it void, or adds to it.

Now I say this. A covenant confirmed beforehand by God in Christ, the law, which came four hundred thirty years after, does not annul, so as to make the promise of no effect.

how will we escape if we neglect so great a salvation -- which at the first having been spoken through the Lord, was confirmed to us by those who heard;