Quran 47:30 Muhammad, ayah 30 of 38

وَلَوْ نَشَآءُ لَأَرَيْنَـٰكَهُمْ فَلَعَرَفْتَهُم بِسِيمَـٰهُمْ ۚ وَلَتَعْرِفَنَّهُمْ فِى لَحْنِ ٱلْقَوْلِ ۚ وَٱللَّهُ يَعْلَمُ أَعْمَـٰلَكُمْ ۝٣٠

47:30 And if We would, We could show them unto thee (Muhammad) so that thou shouldst know them surely by their marks. And thou shalt know them by the burden of their talk. And Allah knoweth your deeds.