Dalil
العربية

Quran Muhammad 47:30

وَلَوۡ نَشَآءُ لَأَرَيۡنَٰكَهُمۡ فَلَعَرَفۡتَهُم بِسِيمَٰهُمۡۚ وَلَتَعۡرِفَنَّهُمۡ فِي لَحۡنِ ٱلۡقَوۡلِۚ وَٱللَّهُ يَعۡلَمُ أَعۡمَٰلَكُمۡ

Translation

And if We willed, We could show them to you, and you would know them by their mark; but you will surely know them by the tone of [their] speech. And Allāh knows your deeds.