Overall meaning : Allah, Exalted be He, says: Do not think, therefore, Muhammad, that Allah will ever fail to keep His promise to His messengers to grant them victory over their enemies. Allah is All-Powerful whose power cannot be resisted, the Lord of just retribution, who avenges Himself on His enemies.
This will take place on the day the earth will be changed into another earth, as will be the heavens, and all people will rise forth from their graves to appear before, and be judged by, Allah, the Omnipotent, the sole King, Creator and Disposer of all affairs who holds sway over all creation. On that Day you will see, Muhammad, the wicked unbelievers bound together in chains; their garments will be of highly flammable pitch, and the fire will cover and burn their faces. That would indeed be the recompense of the wicked for their wrongdoing, and Allah will repay every person according to their deeds. Surely Allah is swift in reckoning.
This Qur’an, which We have sent down to you, Messenger, is a message to all mankind and it is sufficient for them to attain the highest degrees. We have sent it down so that they may be warned of Allah’s punishment and know that Allah is the only God worthy of worship, and so that those who are endowed with insight and sound intellects may take heed.