What is the meaning of "blemishes flesh" in the context of severe beating that permits the wife to demand retribution (qisas) or disciplinary punishment (ta'zir), and does this include cases of bruising resulting from punches to the face or marks from being beaten with an electrical wire on the body?

The permissible beating of a wife is light disciplinary beating that does not cause disability or severe pain. As for severe beating that results in organ damage, visible marks, or severe pain, it is not permissible. Beating the face is forbidden by Islamic law, and severe beating allows the wife to seek divorce.