"And in 'Ad" [51:41], meaning: And We left in 'Ad also a sign, and it is like the first one. "When We sent against them the barren wind" [51:41], which leaves neither a cloud nor a tree, and it is the westerly wind (al-dabur).
﴿وَفِي عَاد﴾ أَي: وَتَركنَا فِي عادٍ أَيْضا آيَة، وَهِي مثل الأولى ﴿إِذْ أرسلنَا عَلَيْهِم الرّيح الْعَقِيم﴾ الَّتِي لَا تدع سحابًا وَلَا شَجرا وَهِي الدبور