Matthew Henry on 2 Chronicles 17:1-9
Here we find concerning Jehoshaphat,
I. What a wise man he was. As soon as he came to the crown he strengthened himself against Israel, Ch2 17:1. Ahab, an active warlike prince, had now been three years upon the throne of Israel, the vigour of his beginning falling in with the decay of Asa's conclusion. It is probable that the kingdom of Israel had, of late, got ground of the kingdom of Judah and began to grow formidable to it; so that the first thing Jehoshaphat had to do was to make his part good on that side, and to check the growing greatness of the king of Israel, which he did so effectually, and without bloodshed, that Ahab soon courted his alliance, so far was he from giving him any d…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Chronicles 17:6
his heart was lifted up in the ways of the Lord--Full of faith and piety, he possessed zeal and courage to undertake the reformation of manners, to suppress all the works and objects of idolatry (see on Ch2 20:33), and he held out public encouragement to the pure worship of God.
Adam Clarke on 2 Chronicles 17:3
The Lord was with Jehoshaphat - "The Word of the Lord was Jehoshaphat's Helper." - Targum.
John Gill on 2 Chronicles 17:6
And his heart was lifted up in the ways of the Lord,.... It was engaged in them, was bent and set upon them; he walked in them with great pleasure and cheerfulness, being inspired with zeal and courage; he was fearless and intrepid, and regarded not any opposition he might have, or expect to have, in the work of reformation in which he was concerned:
moreover, he took away the high places; such as were dedicated to idols, but not those in which the true God was worshipped, 2 Chronicles 20:33
and groves out of Judah; where idols were placed; for though these had been removed by Asa, yet had been renewed in the latter part of his days, when more negligent of religion.
Tyndale Open Study Notes