'Confirm' in the Bible
Now formerly in Israel this was the custom concerning redeeming and exchanging. To confirm a transaction, a man pulled off his sandal and gave it to the other. This was the way of attesting in Israel.
Now, O Lord God, confirm forever the word You have given as to Your servant and his house; and do as You have said,
Behold, while you are still talking there with the king, I also will come in after you and confirm your words.
There came against the land Pul king of Assyria, and Menahem gave Pul 1,000 talents of silver, that he might help him to confirm his kingship.
The king stood [on the platform] by the pillar and made a covenant before the Lord -- "to walk after the Lord and to keep His commandments, His testimonies, and His statutes with all his heart and soul, to confirm the words of this covenant that were written in this book. And all the people stood to join in the covenant.
To confirm that these days of Purim should be observed at their appointed times, as Mordecai the Jew and Queen Esther had commanded [the Jews], and as they had ordained for themselves and for their descendants in the matter of their fasts and their lamenting.
You, O God, did send a plentiful rain; You did restore and confirm Your heritage when it languished and was weary.
And let the beauty and delightfulness and favor of the Lord our God be upon us; confirm and establish the work of our hands -- "yes, the work of our hands, confirm and establish it.
Establish Your word and confirm Your promise to Your servant, which is for those who reverently fear and devotedly worship You.
Thus says the Lord of hosts, the God of Israel: You and your wives have both declared with your mouths and fulfilled it with your hands, saying, We will surely perform our vows that we have vowed to burn incense to the queen of heaven and to pour out drink offerings to her. [Surely] then confirm your vows and [surely] perform your vows! [If you will defy all My warnings to you, then, by all means, go ahead!]
And I will confirm with them a covenant of peace and will cause the evil beasts to cease out of the land, and [My people] shall dwell safely in the wilderness, desert, or pastureland and sleep [confidently] in the woods.
Also I [the angel], in the first year of Darius the Mede, even I, stood up to confirm and to strengthen him [Michael, the angelic prince].
And flight shall be lost to the swift and refuge shall fail him; the strong shall not retain and confirm his strength, neither shall the mighty deliver himself.
Do we then by [this] faith make the Law of no effect, overthrow it or make it a dead letter? Certainly not! On the contrary, we confirm and establish and uphold the Law.
So that He may strengthen and confirm and establish your hearts faultlessly pure and unblamable in holiness in the sight of our God and Father, at the coming of our Lord Jesus Christ (the Messiah) with all His saints (the holy and glorified people of God)! Amen, (so be it)!
So you also must be patient. Establish your hearts [strengthen and confirm them in the final certainty], for the coming of the Lord is very near.