Rashi on II Kings
And it was so. Not that his kingdom deserved to last that long, but to fulfill the word of the King,9I.e., the word of God stated in 10:30 above. as it is stated, ”So shall be My word, which will go forth from My mouth etc.”10Yeshayohu 55:11.
Metzudat David on II Kings
When Jehoachaz, Joash, Jeraboam, and Zechariah reigned, their royal bloodline ceased.