Surah Yunus 10:38

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

Or do they say [about the Prophet (ﷺ)], "He invented it?" Say, "Then bring forth a sūrah like it and call upon [for assistance] whomever you can besides Allāh, if you should be truthful."

Translation: Saheeh International

Tafsir

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; …

Excerpt from Tafsir al-Jalalayn, commentary on 10:38, via Quran.com. The reader has the full commentary and 9 more tafsirs.