Surah Al-Ankaboot, Verse 48
Translation — Sahih International
And you did not recite before it any scripture, nor did you inscribe one with your right hand. Otherwise the falsifiers would have had [cause for] doubt.
Source
Kur'an-ı Kerim, Ankebût Suresi 29:48
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/29-suresi-48-ayet