The Resurrection after Death is true, there is Wisdom behind it, and it is easy for Allah Allah says:وَأَقْسَمُواْ بِاللّهِ جَهْدَ أَيْمَانِهِمْ لَا يَبْعَثُ اللّهُ مَن يَمُوتُAnd they swear by Allah with their strongest oaths, that Allah will not raise up one who dies.meaning that they made oaths swore fervently that Allah would not resurrect the one who died. They considered that to be improbable, and did not believe the Messengers when they told them about that, swearing that it could not happen.Allah said, refuting them:بَلَىYes,meaning it will indeed happen,وَعْدًا عَلَيْهِ حَقًّاa promise (binding) upon Him in truth,- meaning it is inevitable,وَلـكِنَّ أَكْثَرَ النَّاسِ لَا يَعْلَمُونَbut most of mankind know not.means, because of their ignorance they oppose the Messengers and fall into disbelief.Then Allah mentions His wisdom and the reason why He will resurrect mankind physically on the Day of Calling (between the people of Fire and of Paradise).He says