The cause was of God. — It was brought about by God. Literally, it was a turn or turning-point (of events) from with God. The word n’sibbah is equivalent to sibbah of Kings. Both are isolated in the Old Testament. The latter is the common word for “cause” in Rabbinic, as sibbath sibbôth — causa causarum.
That the Lord might perform his word. — The chronicler does not deviate from the text of Kings here, although he has not mentioned Ahijah’s prophecy to Jeroboam before. (Comp. 2 Chronicles 9:29.)