يونس — Yunus Ayat 38
اَمْ يَقُوْلُوْنَ افْتَرٰىهُ ۗ قُلْ فَأْتُوْا بِسُوْرَةٍ مِّثْلِهٖ وَادْعُوْا مَنِ اسْتَطَعْتُمْ مِّنْ دُوْنِ اللّٰهِ اِنْ كُنْتُمْ صٰدِقِيْنَ
Am yaqūlūnaftarāh(u), qul fa'tū bisūratim miṡlihī wad‘ū manistaṭa‘tum min dūnillāhi in kuntum ṣādiqīn(a).
"Or do they say [about the Prophet], "He invented it?" Say, "Then bring forth a surah like it and call upon [for assistance] whomever you can besides Allah, if you should be truthful.""