Commentary for II Kings 13:10

In the thirty-seventh year, etc. This verse is contradicted from two sides, and I have not found a reconciliation, for it should have said, “thirty-ninth [year],” because his father ascended [to the throne] in the twenty-third year of Yoash[’s reign], and reigned seventeen years, consequently, he died in the thirty-ninth year of Yoash[’s reign]. Also, it is stated below in this section, “In the second year of Yoash son of Y[eh]oachaz, king of Yisroel, Amatzyoh, son of Yoash became king.”²Below 14:1.—the king of Yehudah—Consequently, Yoash son of Yehoachaz, ascended [to the throne] in the fortieth year of Yoash, which was his last year, and in the second year of Yoash son of Yehoachaz, Amatzyoh became king. And even if you say that Amatzyoh became king in the year of his father’s death, and Scripture calls this the second year of Yoash[’s reign], [nonetheless,] you can deduce that Yoash the king of Yisroel did not become king until the thirty-ninth year of Yoash the king of Yehudah.