Isaiah 10:8

“For he saith, [are] not my princes altogether kings?] Meaning either the kings which he had conquered, which were become his princes and subjects; or rather, such were the greatness and glory of his nobles, that they were equal in their riches and dominions to kings, and so were able to furnish him with men and money for such an expedition he had in his heart to undertake, even to conquer and subdue all the nations of the earth: and this he said either to his people, boasting of his grandeur; or in his heart, as Kimchi observes, to encourage himself; or rather more openly before others, in order to discourage and inject terror into the nations he meant to destroy, and particularly the…”

“Vauntings of the Assyrians. Illustrated by the self-laudatory inscriptions of Assyria deciphered by HINCKS. princes . . . kings--Eastern satraps and governors of provinces often had the title and diadem of kings. Hence the title, "King of kings," implying the greatness of Him who was over them (Eze 26:7; Ezr 7:12).”

“For he saith - This verse, and the subsequent verses to Isaiah 10:11, contain the vaunting of the king of Assyria, and the descriptions of his own confidence of success. Are not my princes altogether kings? - This is a confident boast of his “own” might and power. His own dominion was so great that even his princes were endowed with the ordinary power and “regalia” of kings. The word “princes,” may here refer either to those of his own family and court - to the satraps and officers of power in his army, or around his throne: or more probably, it may refer to the subordinate governors whom he had set over the provinces which he had conquered. ‘Are they not clothed with royal power and…”

“Kings - Equal for power and wealth, and glory, to the kings of other nations. Isaiah 10:9”

“Isa 36:8; Kg2 18:24, Kg2 19:10; Eze 26:7; Dan 2:37 Isaiah 10:9”