1 Chronicles 2:7

We have then so far seven grandsons to Judah, when a new name, unmentioned before, is introduced—Carmi. He is neither described as one of the seven grandsons nor as descended from any one of them, but unenviably enough is marked as the father of Achar —later form of Achau— the troubler of Israel . Joshua 7:1-18 supplies the missing link, and states that Carmi is son of Zimri (Zabdi), one of the aforesaid seven grandsons. By the punishment of death, visited upon this Achar, with his sons and daughters ( Joshua 7:24 , Joshua 7:25 ), it may be presumed that the line of Judah through him became extinct.