2 Chronicles 14:3

He took away the altars of the strange gods Since the time when Solomon admitted idolatry, in the latter end of his reign, it appears, nothing had been done till now to suppress it; so that it may be presumed it had gained ground. Strange gods were worshipped, and had their altars, images, and groves: and the temple-service, though kept up by the priests, was neglected by many of the people. As soon as Asa had power in his hands, he made it his business to destroy those idolatrous altars and images, they being a great provocation to the jealous God, and a great temptation to a careless and unthinking people. He hoped, by destroying the idols, to reform the idolaters, which he had in view, and not their destruction.