'Confirmation' in the Bible

They saw falseness and {a lying divination}, the ones saying, 'Declaration of Yahweh!' and Yahweh did not send them, and they wait {for the confirmation of their word}.

just as it is right for me to think this about all of you, because I have you in my heart, [since] both in my imprisonment and in the defense and confirmation of the gospel all of you are sharers of grace with me.

For people swear by what is greater [than themselves], and the oath for confirmation [is the] end of all dispute for them.