Or do they say [about the Prophet], "He invented it?" Say, "Then (10:38)

Almuntakhab Fi Tafsir Alquran Alkarim

Or do they say: He Muhammad has forged it Say to them: If you do believe I did, then produce one Surah the like thereof, and call on all those besides Allah whom you can possibly engage to venture upon this undertaking if indeed you are declaring the truth

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(10:38) Do they say that the Messenger has himself composed the Qur'an? Say: 'In that case bring forth just one surah like it and call on all whom you can, except Allah, to help you if you are truthful. *46

Or do they say [about the Prophet], "He invented it?" Say, "Then meaning

*46).It is generally believed that the challenge embodied in this verse has a reference merely to the eloquence, rhetoric and other literary qualities of the Qur'an. Were one to read the writings of Muslim scholars in connection with the explanation of this verse, it is not surprising that people should entertain such a misunderstanding.
However, the Qur'an is far above claiming its uniqueness and inimitability merely on the grounds of its literary merits. Although there can be no doubt about the literary excellence of the Qur'an, the main ground on which it is claimed that no human being could produce a book like it has to do with its contents and teaching. The Qur'an alludes, in many places, to those characteristics of its inimitability which could not have been conferred upon it by man, thus hinting that those characteristics could have no other source but God Himself. We have explained, in the course of this work, all such allusions in the Qur'an. In order to avoid repetition, we would like at this stage to avoid engaging in any discussion on that subject. (For further explanation see al-Tur 52, nn. 26-7.)
 

Or do they say [about the Prophet], "He invented it?" Say, "Then meaning in Urdu

کیا یہ لوگ کہتے ہیں کہ پیغمبرؐ نے اسے خود تصنیف کر لیا ہے؟ کہو، “اگر تم اپنے اس الزام میں سچّے ہو تو ایک سُورۃ اس جیسی تصنیف کر لاؤ اور ایک خدا کو چھوڑ کر جس جس کو بُلا سکتے ہو مدد کے لیے بُلا لو"