وَلَوْ نَشَاء لَأَرَيْنَاكَهُمْ فَلَعَرَفْتَهُم بِسِيمَاهُمْ وَلَتَعْرِفَنَّهُمْ فِي لَحْنِ الْقَوْلِ وَاللَّهُ يَعْلَمُ أَعْمَالَكُمْ
[47:30]
And if We please We would have made you know them so that you would certainly have recognized them by their marks and most certainly you can recognize them by the intent of (their) speech; and Allah knows your deeds.
Had We so wiled, We could have shown them up to thee, and thou shouldst have known them by their marks: but surely thou wilt know them by the tone of their speech! And Allah knows all that ye do.
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.