2 Kings 11:12 - Joseph Benson’s Commentary on the Old and New Testaments

And put the crown upon him Having produced Joash, he put the crown on his head, which, it is likely, was kept in the sanctuary. And gave him the testimony The book of the law, which he put into the king's hand to remind him of his duty at his entrance upon his kingdom, which was to read and write out that holy book, (Deuteronomy 17:18,) and to govern himself and his kingdom by it; the law of God being frequently and most properly called a testimony, because it is a witness of God's will, and man's duty. They made him king, and anointed him As was wont to be done in doubtful cases, when there was any competition or question about the crown, as now there was.