Jehoshaphat, fourth king of Judah, born about 950 B. C, succeeded his father Asa about 915, and died about 890. He fortified himself at first against Ahab, king of Israel, but afterward was connected with him by alliance in war and the marriage of their children. He was however zealous in punishing idolatry and improving the administration of justice. He took tribute from the Philistines and Arabians, and maintained a large standing army. He was Ahab's ally at the fatal battle of Ramoth-Gilead, but escaped without hurt. In alliance with Ahaziah, king of Israel, he built a fleet for an expedition to Ophir, but it was wrecked. He was successful against the Moabites and Ammonites, accompanied Jehoram of Israel in his campaign against Moab, in which they were joined by the king of Edom, and maintained the supremacy of Judah over the latter country. In his last years his son Jehoram was associated with him in the government. - The name Jehoshaphat signifies "Jehovah judgeth," and the prophet Joel (ch. iii. 2, 12) predicts the judgment of the heathen in the "valley of Jehoshaphat;" not any actual valley, but an ideal scene of Jehovah's righteous judgments on the nations, called in verse 14 "the valley of decision." But in later times the prophecy has been applied to the final judgment, and the valley of Jehoshaphat has been localized as the ravine between Jerusalem and the Mount of Olives. This application of the name appears in the 4th century, and the belief that the final judgment will take place there has led the Jews and the Moslems for centuries to use the sides of the valley as a place of burial.