'Fulfill' in the Bible

and so that the LORD may fulfill his promise that he spoke about me when he said, "If your sons pay attention to how they live by walking truthfully in my presence with all their heart and with all their soul, you will never lack a man on the throne of Israel.'

The king would not listen to the people, because the turn of events was from the LORD, to fulfill his prediction that the LORD spoke by means of Ahijah the Shilonite to Nebat's son Jeroboam