Verses with the word confirmeth in the Old Testament (3 verses):

Numbers 30:14
But if her husband altogether hold his peace at her from day to day; then he establisheth all her vows, or all her bonds, which are upon her: he confirmeth them, because he held his peace at her in the day that he heard them.

Deuteronomy 27:26
Cursed be he that confirmeth not all the words of this law to do them. And all the people shall say, Amen.

Isaiah 44:26
That confirmeth the word of his servant, and performeth the counsel of his messengers; that saith to Jerusalem, Thou shalt be inhabited; and to the cities of Judah, Ye shall be built, and I will raise up the decayed places thereof: