'Confirm' in the Bible

And Pul the king of Assyria came against the land: 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.

Furthermore, Josiah removed the mediums, the necromancers, the household gods, the idols, and every despicable thing that could be seen in the territory of Judah and in Jerusalem, so that he might confirm the words of the Law that had been written in the book that Hilkiah the priest had discovered in the LORD's Temple.