﴿ أَمْ يَقُولُونَ ٱفْتَرَىٰهُ ۖ قُلْ فَأْتُوا۟ بِسُورَةٍۢ مِّثْلِهِۦ وَٱدْعُوا۟ مَنِ ٱسْتَطَعْتُم مِّن دُونِ ٱللَّهِ إِن كُنتُمْ صَٰدِقِينَ ﴾

“And yet, they [who are bent on denying the truth] assert, "[Muhammad] has invented it!" Say [unto them]: "Produce, then, a surah of similar merit; and [to this end] call to your aid whomever you can, other than God, if what you say is true!”

Or do they say ‘He has invented it’? Muhammad (s) has invented it. Say ‘Then bring a sūra like it in terms of the clarity and the rhetorical excellence of its language by way of invention for you are eloquent speakers of Arabic like me; and call upon whom you can for help in this matter besides God that is other than Him if you are truthful’ in saying that this is an invention. But they were not able to do this.