Hud 11:13 ام يقولون افتراه قل فاتوا بعشر سور مثله مفتريات وادعوا من استطعتم من دون الله ان كنتم صادقين ١٣
أَمۡ
يَقُولُونَ
ٱفۡتَرَىٰهُۖ
قُلۡ
فَأۡتُواْ
بِعَشۡرِ
سُوَرٖ
مِّثۡلِهِۦ
مُفۡتَرَيَٰتٖ
وَٱدۡعُواْ
مَنِ
ٱسۡتَطَعۡتُم
مِّن
دُونِ
ٱللَّهِ
إِن
كُنتُمۡ
صَٰدِقِينَ
١٣
またかれらは，「かれがそれ（クルアーン）を作ったのです。」と言う。言ってやるがいい。「もしあなたがたの言葉が真実ならば，それに類する10章を作って，持って来なさい。また出来るならあなたがた（を助けることの出来る）アッラー以外の者を呼びなさい。」
Read Tafsir
Ibn Kathir (Abridged)
The Messenger grieving by the Statements of the Polytheists, and His Gratification
This statement of Allah, the Exalted, to His Messenger comforted the worries that the polytheists were causing him due to their statements directed towards him. This is just as Allah says about them,
وَقَالُواْ مَا لِه
…The Messenger grieving by the Statements of the Polytheists, and His Gratification
This statement of Allah, the Exalted, to His Messenger comforted the
…