وَمَا كُنتَ تَتْلُوا۟ مِن قَبْلِهِۦ مِن كِتَـٰبٍ وَلَا تَخُطُّهُۥ بِيَمِينِكَ ۖ إِذًا لَّٱرْتَابَ ٱلْمُبْطِلُونَ
Wa maa kunta tatloo min qablihee min kitaabinw wa laa takhuttubhoo bi yameenika izal lartaabal mubtiloon
You did not recite any scripture before this, nor did you write one with your right hand — otherwise, those who follow falsehood would have had grounds for doubt.