Berean Study Bible (BSB) - 1 Kings 22:41 >

In the fourth year of Ahab’s reign over Israel, Jehoshaphat son of Asa became king of Judah.

Jewish Publication Society of America Version (JPS1917) - 1 Kings 22:41 >

And Jehoshaphat the son of Asa began to reign over Judah in the fourth year of Ahab king of Israel.