"Say, what would my Lord care for you," meaning: what would He do with you, "if not for your supplication," meaning: if not for your monotheism. "For you have denied," referring to the polytheists, "so it is going to be inseparable," meaning: it will be a seizure of punishment. He promises them this on the Day of Badr; thus, Allah bound them on the Day of Badr to the punishment for their disbelief and their denial, so He punished them by the sword.