Overall meaning : Allah instructs His Prophet Muhammad, may Allah bless him and grant him peace, to strive mightily against the unbelievers and the hypocrites, stating that their ultimate abode in the hereafter will be the fire of Hell—evil indeed is the abode in which they will end up!
He also states that the hypocrites falsely swear by Allah that they have not on any account uttered a statement of unbelief (such as by abusing the Prophet and reviling Islam), but they have indeed uttered it and renounced Islam after embracing it, sought to do what they could not attain and have had no reason whatsoever to be spiteful and critical except that Allah and His Messenger has enriched them out of His bounty. Hence, if they repent of their unbelief and hypocrisy, this will be for their own good; but if they turn away from faith and repentance, Allah will inflict a painful punishment on them in this world and in the life to come, and they will find no helper in the world to help them or benefit them, nor any supporter to protect them against harm.