47:30
وَلَوْ نَشَآءُ لَأَرَيْنَـٰكَهُمْ فَلَعَرَفْتَهُم بِسِيمَـٰهُمْ ۚ وَلَتَعْرِفَنَّهُمْ فِى لَحْنِ ٱلْقَوْلِ ۚ وَٱللَّهُ يَعْلَمُ أَعْمَـٰلَكُمْ
walaw nashāu la-araynākahum falaʿaraftahum bisīmāhum walataʿrifannahum fī laḥni l-qawli wal-lahu yaʿlamu aʿmālakum
We could even point them out to you [Prophet] if We wished, and then you could identify them by their marks, but you will know them anyway by the tone of their speech. God knows everything you [people] do.
Had We willed, We could have shown them to you, and you should have known them by their marks; but surely, you will know them by the tone of their speech! And Allâh knows (all) your deeds.