37:156
أَمْ لَكُمْ سُلْطَـٰنٌۭ مُّبِينٌۭ ١٥٦
Saheeh International
Or do you have a clear authority?
Tafsir of "Ibn Kathir" (English)
Will you not then remember Or is there for you a plain authority!means, `evidence to prove what you say.'فَأْتُوا بِكِتَابِكُمْ إِن كُنتُمْ صَادِقِينَ