'Fulfill the Word of the Lord' in the Bible

So Solomon thrust out Abiathar from being priest unto the LORD; that he might fulfill the word of the LORD, which he spoke concerning the house of Eli in Shiloh.

To fulfill the word of the LORD by the mouth of Jeremiah, until the land had enjoyed its sabbaths: for as long as it lay desolate it kept sabbath, to fulfill threescore and ten years.