This is that Ahab who thought that he would make little progress in the new religion [i.e., idolatry] if he worshiped only the gods introduced by Jeroboam. Therefore he established rites for Baal, the god of the Sidonians, built his temple in the royal city, erected altars and planted sacred groves. And these actions bitterly enraged the prophets and the other worshipers of the true God.
Source: ON THE FIRST BOOK OF KINGS 16:29