Surah Yunus (10:38)

أَمْ يَقُولُونَ ٱفْتَرَىٰهُ قُلْ فَأْتُوا۟ بِسُورَةٍ مِّثْلِهِۦ وَٱدْعُوا۟ مَنِ ٱسْتَطَعْتُم مِّن دُونِ ٱللَّهِ إِن كُنتُمْ صَٰدِقِينَ

Or do they say, “He has fabricated it”? Say, “Then bring a surah like it, and call whomever you are able, apart from Allah, if you are truthful.”