'Confirm' in the Bible

Now this was the custom in former time in Israel concerning redemption and concerning exchange, to confirm the whole matter: a man drew off his sandal, and gave it to his neighbour, and this was the mode of attestation in Israel.

Behold, while thou yet talkest there with the king, I also will come in after thee and confirm thy words.

that Jehovah may confirm his word which he spoke concerning me, saying, If thy sons take heed to their way, to walk before me in truth with all their heart and with all their soul, there shall not fail thee, said he, a man upon the throne of Israel.

And queen Esther the daughter of Abihail, and Mordecai the Jew, wrote with all authority to confirm this second letter of Purim.

to confirm these days of Purim in their fixed times, according as Mordecai the Jew and queen Esther had enjoined them, and as they had decreed for themselves and for their seed, as to the matters of the fastings and their cry.

Strengthen the weak hands and confirm the tottering knees.

And he shall confirm a covenant with the many for one week; and in the midst of the week he shall cause the sacrifice and the oblation to cease, and because of the protection of abominations there shall be a desolator, even until that the consumption and what is determined shall be poured out upon the desolate.

And I, in the first year of Darius the Mede, I stood to confirm and to strengthen him.

but I have besought for thee that thy faith fail not; and thou, when once thou hast been restored, confirm thy brethren.

For I say that Jesus Christ became a minister of the circumcision for the truth of God, to confirm the promises of the fathers;

who shall also confirm you to the end, unimpeachable in the day of our Lord Jesus Christ.

and sent Timotheus, our brother and fellow-workman under God in the glad tidings of Christ, to confirm you and encourage you concerning your faith,