All of them were registered by genealogies in the days of King Jotham of Judah and in the days of King Jeroboam of Israel. This means: All these descendants of Reuben, Gad, and the half-tribe of Manasseh were registered by genealogies for this war that they made on the Hagrites (v. 19); that is, they were enumerated by the clans of their ancestral houses when they went out to war. This happened in the days of King Jotham of Judah and in the days of King Jeroboam of Israel—that is, Jeroboam son of Joash, a descendant of Jehu. This is despite the fact that it seems from the verses in Kings that King Jotham of Judah and King Jeroboam of Israel did not rule concurrently. For Jeroboam ruled for forty-one years (2 Kings 14:23); in Jeroboam’s twenty-seventh year, King Azariah—that is, Uzziah—son of Amaziah ascended to the throne (ibid. 15:1); and this Azariah ruled for fifty-two years (ibid. 15:2). King Azariah of Judah, then, ruled for thirty-eight years after the death of King Jeroboam of Israel. (Even though one can quibble over these calculations, as we will explain [in our commentary] on the book of Kings [ibid. 15:1], Uzziah still lived for a long time after Jeroboam.) How, then, could Jotham son of Uzziah have ruled in the days of Jeroboam? Because Jotham son of Uzziah ruled during the lifetime of his father Uzziah, from the time Uzziah became a leper, as the text says, “The Lord struck the king with a plague … while Jotham, the king’s son, was in charge of the palace and governed the people of the land” (ibid. 15:5). One might also explain “in the days of Jotham … and in the days of Jeroboam” to mean each one in his time, and that [these tribes] registered for the war with each of them.