وَإِنَّ رَبَّكَ لَهُوَ ٱلْعَزِيزُ ٱلرَّحِيمُ
Commentary:
The verse signifies that God is Mighty, i.e. He has the power to give victory to the poor and resourceless believers, and He is Merciful, i.e. He shows mercy to a sinner when he sincerely turns to Him for forgiveness. In this verse the Meccans have been warned that the cause of the Holy Prophet was sure to triumph and that they will get a severe punishment like that of the rejecters of the Prophets of yore but if they repented, God will forgive them and show mercy to them.