Jeroboam has committed a great evil in setting up the two golden calves. Now, in an effort to find out about his son, he learns that his line will end and Israel will be scattered beyond the Euphrates. This info comes from the same prophet who, during Solomon's reign, told Jeroboam that he would be king (1 Kings 11:26-40). Just because you start out well doesn't mean you'll have a strong finish.