The prophetical activity of Amos commenced after Hosea's had closed, and before Isaiah's began. Though he had an impediment in his speech, he obeyed the call of God, and betook himself to Beth-el to proclaim to the sinful inhabitants thereof the Divine message with which he had been charged. The denunciation of the priest Amaziah, of Beth-el, who informed against the prophet before King Jeroboam of Israel, did him no harm, for the king, idolater though he was, entertained profound respect for Amos. He said to himself: "God forbid I should think the prophet guilty of cherishing traitorous plans, and if he were, it would surely be at the bidding of God." For this pious disposition Jeroboam was rewarded; never had the northern kingdom attained to such power as under him.