Qur'an 52:38

أَمْ لَهُمْ سُلَّمٌ يَسْتَمِعُونَ فِيهِ ۖ فَلْيَأْتِ مُسْتَمِعُهُم بِسُلْطَـٰنٍ مُّبِينٍ

“Or have they a stairway [into the heaven] upon which they listen? Then let their listener produce a clear authority [i.e., proof].”

At-Tur 52:38 · Saheeh International