Aţ-Ţūr 52:38 · سُورَةُ الطور

أَمْ لَهُمْ سُلَّمٌ يَسْتَمِعُونَ فِيهِ ۖ فَلْيَأْتِ مُسْتَمِعُهُم بِسُلْطَـٰنٍ مُّبِينٍ

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].

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