Ezekiel 16:26

Thou hast also committed fornication with the Egyptians thy neighbours, great of flesh; and hast increased thy whoredoms, to provoke me to anger.

Thou hast also committed fornication with the Egyptians - alliances with Egypt, cemented by sharing their idolatries.

Great of flesh - of powerful virile parts; figurative for the gross and lustful religion of Egypt (e. g., that of Isis, etc.), which alone could satisfy the abominable lust of Israel (Ezekiel 20:7; Ezekiel 23:19).

To provoke me to anger - wantonly and purposely.