Sura 52 At-Tur ((The mountain) Toor), aya 38

1. أَمْ لَهُمْ سُلَّمٌ يَسْتَمِعُونَ فِيهِ ۖ فَلْيَأْتِ مُسْتَمِعُهُمْ بِسُلْطَانٍ مُبِينٍ

   Or have they a stairway (into the heaven) upon which they listen? Then let their listener produce a clear authority.

   52:38

Tafsiri: Saheeh International