John Gill Commentary Ezekiel 31:10

"Therefore thus said the Lord Jehovah: Because thou art exalted in stature, and he hath set his top among the thick boughs, and his heart is lifted up in his height;" — Ezekiel 31:10 (ASV)

Therefore thus says the Lord God Having described the greatness of the Assyrian monarch; now follows the account of his fall, and the cause of it, pride: because you have lifted up yourself in height ;

this is either an address to Pharaoh king of Egypt, who, though he did not rise up so high as the Assyrian monarch in glory and grandeur; yet he lifted up himself, and thought himself superior to any; which reason he must be brought down: or the words are directed to the Assyrian monarch, by a change of person frequent in Scripture; who, though he was raised by the Lord to the height of honour and dignity he was, yet ascribed it to himself:

and he has shot up his top among the thick boughs ; the multitude of provinces over which he became head and governor; (See Gill on Ezekiel 31:3):

and his heart is lifted up in his height ; with pride, insolence, and contempt of God and men; of which see the instances in (Isaiah 10:8–15) (36:18-20) (37:10-13) .