At-Tûr 52:38

أَمْ لَهُمْ سُلَّمٌ يَسْتَمِعُونَ فِيهِ ۖ فَلْيَأْتِ مُسْتَمِعُهُم بِسُلْطَانٍ مُّبِينٍ ٣٨

Am lahum sullamun yastamiAAoona feehi falyati mustamiAAuhum bisultanin mubeenin

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“Or have they any stairway (unto heaven) by means of which they overhear (decrees). Then let their listener produce some warrant manifest!” (52:38)