Surah Al-Israa, Verse 88
Translation — Sahih International
Say, "If mankind and the jinn gathered in order to produce the like of this Qur'an, they could not produce the like of it, even if they were to each other assistants."
Source
Kur'an-ı Kerim, İsrâ Suresi 17:88
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/17-suresi-88-ayet