So Jotham grew powerful because he ordered his ways before the LORD his God.
There is not much more related here concerning Jotham than we had before, Kg2 15:32, etc. I. He reigned well. He did that which was right in the sight of the Lord; the course of his reign was good, and pleasing to God, whose favour he made his end, and his word his rule, and (which shows that he acted from a good principle) he...
Commenting on 2 Chronicles 27:1-9
Now the rest of the acts of Jotham, and all his wars,.... Not only with the Ammonites, but with the Syrians, and ten tribes, see Kg2 15:37. and his ways, lo, they are written in the books of the kings of Israel and Judah; not in the canonical books of Kings, but in the Chronicles of the kings of both nations, see Kg2 15:36.
So Jotham became mighty, because he prepared his ways before the LORD his God. (d) He shows that all prosperity comes from God, who never fails when we put our trust in him.