الطور — At-Tur Ayat 38
اَمْ لَهُمْ سُلَّمٌ يَّسْتَمِعُوْنَ فِيْهِۚ فَلْيَأْتِ مُسْتَمِعُهُمْ بِسُلْطٰنٍ مُّبِيْنٍۗ
Am lahum sullamuy yastami‘ūna fīh(i), falya'ti mustami‘uhum bisulṭānim mubīn(in).
"Or have they a stairway [into the heaven] upon which they listen? Then let their listener produce a clear authority."