Allah(swt), told us to make us realize

 أَلَمْ يَرَوْا كَمْ أَهْلَكْنَا قَبْلَهُم مِّنْ الْقُرُونِ أَنَّهُمْ إِلَيْهِمْ لاَ يَرْجِعُونَ 36:31

(Fathe Muhammad Jalandari)
کيا انہوں نے نہيں ديکھا کہ ہم نے ان سے پہلے بہت سے لوگوں کو ہلاک کرديا تھا اب وہ ان کي طرف لوٹ کر نہيں آئيں گے 36:31

(Muhammad Assad)
 36:31 Are they not aware of how many a generation We have destroyed before their time, [and] that those [that have perished] will never return to them, 36:31

(Yousaf Ali)
 36:31 See they not how many generations before them we destroyed? Not to them will they return:36:31