Ar Rum Ayah 47

وَلَقَدْ أَرْسَلْنَا مِن قَبْلِكَ رُسُلاً إِلَىٰ قَوْمِهِمْ فَجَآءُوهُم بِٱلْبَيِّنَـٰتِ فَٱنتَقَمْنَا مِنَ ٱلَّذِينَ أَجْرَمُواْ‌ۖ وَكَانَ حَقًّا عَلَيْنَا نَصْرُ ٱلْمُؤْمِنِينَ ٤٧ Indeed, We sent before you ?O Prophet? messengers, each to their own people, and they came to them with clear proofs. Then We inflicted punishment upon those who persisted in wickedness. For it is Our duty to help the believers.