'Confirm' in the Bible

There came against the land Pul the king of Assyria; and Menahem gave Pul a thousand talents of silver, that his hand might be with him to confirm the kingdom in his hand.

And the king stood by the pillar, and made a covenant before Jehovah, to walk after Jehovah, and to keep his commandments, and his testimonies, and his statutes, with all his heart, and all his'soul, to confirm the words of this covenant that were written in this book: and all the people stood to the covenant.

Moreover them that had familiar spirits, and the wizards, and the teraphim, and the idols, and all the abominations that were seen in the land of Judah and in Jerusalem, did Josiah put away, that he might confirm the words of the law which were written in the book that Hilkiah the priest found in the house of Jehovah.