وَلَقَد تَّرَكْنَا مِنْهَا ايَةً بَيِّنَةً. And indeed We have left thereof an evident Ayah i.e., a clear sign,.. لِّقَوْمٍ يَعْقِلُونَfor a folk who understand.This is like the Ayah,وَإِنَّكُمْ لَّتَمُرُّونَ عَلَيْهِمْ مُّصْبِحِينَوَبِالَّيْلِ أَفَلَ تَعْقِلُونَ Verily, you pass by them in the morning and at night; will you not then reflect. (37:137-138