﴿ يَوْمَ لَا يُغْنِى عَنْهُمْ كَيْدُهُمْ شَيْـًۭٔا وَلَا هُمْ يُنصَرُونَ ﴾

“the Day when none of their scheming will be of the least avail to them, and they will receive no succour.”

(A day) which is the Day of Judgement (in which their guile will naught avail them) the doing of Abu Jahl and his host will not benefit them at all against Allah's chastisement, (nor will they be helped) nor will they be prevented from what is wanted with them.