52:38
أَمْلَهُمْسُلَّمٌيَسْتَمِعُونَفِيهِ ۖفَلْيَأْتِمُسْتَمِعُهُمبِسُلْطَٰنٍمُّبِينٍ٣٨
am lahum sullamun yastamiʿūna fīhi falyati mus'tamiʿuhum bisul'ṭānin mubīnin
Or have they a stairway [into the heaven] upon which they listen? Then let their listener produce a clear authority [i.e., proof].(38)