Ezekiel 28:6

Therefore thus saith the Lord God
Now follows the punishment threatened, because of all this pride, haughtiness, and blasphemy: because thou hast set thine heart as the heart of God;
seeking thine own glory; setting up thyself above all others; assuming that to thyself which belongs to God; and making thyself equal to him, or showing thyself as if thou wast God; (See Gill on Ezekiel 28:2).