God had told Elijah that he would anoint Jehu (1 Kings 19:16).55He did this through his successor Elisha who accomplished it by using one of his protégés (v. 1). Jehu would wipe out Omri's dynasty in Israel (v. 7-10). Jehu's father was a different Jehoshaphat from Judah's king of the same name (v. 2). Elijah had prophesied the end of Ahab's line (1 Kings 21:21-22, 29) and Jezebel's death (1 Kings 21:23). God had worked through prophets previously, especially Elijah and Elisha, and would continue to do so. However, Jehu was just as much an instrument in God's hand as the prophets, though his methods were not always proper.56
"At times the behavior of the prophet was unusual or abnormal, but a careful consideration of each of these instances will reveal some divine purpose or spiritual significance."57
"Jehu is the only king of the Northern Kingdom (Israel) to have been anointed, perhaps to indicate that he should follow in the Davidic tradition, as Saul had been anointed by Samuel (1 Sa. 9:16; 10:1); David by Samuel, to mark the Spirit of God endowing him for the task (1 Sa. 16:12-13); and Solomon by the high priest Zadok and Nathan the prophet (1 Ki. 1:45). Such anointing was symbolic and probably confined to Hebrew practice (see also on 1 Ki. 1:34)."58