‘ And Adonibezek said, “Threescore and ten kings, having their thumbs and their great toes cut off, gathered their meat under my table. As I have done, so God has requited me.” And they brought him to Jerusalem and there he died.'
He received what was his due for he had done this to his enemies and had further humiliated them by making them fight for scraps of food tossed to them from his table. The kings would be petty kings, ruling cities and small towns, although he was probably speaking broadly of leading men in general, and, as was common with war leaders, exaggerating.
“Seventy” is a round number indicating divine perfection (perfection in the eyes of the gods), seven intensified. Seven was seen as such a number throughout the ancient world. Thus he saw the number of kings he had so mistreated as a goodly number.
“As I have done, so God has requited me.” He recognised the justice of the situation, and the writer wishes us to recognise it too. Those who misuse others bring judgment on their own heads.
“And they brought him to Jerusalem and there he died.” He may have been badly wounded, or his wounds may have gone gangrenous for he died shortly after. ‘Brought him to Jerusalem' signifies ‘to the district round it', for their next task was the subjugation of that city.