Surah Al-Ankaboot, Verse 49
بَلْ هُوَ ءَايَٰتٌۢ بَيِّنَٰتٌۭ فِى صُدُورِ ٱلَّذِينَ أُوتُوا۟ ٱلْعِلْمَ ۚ وَمَا يَجْحَدُ بِـَٔايَٰتِنَآ إِلَّا ٱلظَّٰلِمُونَ
Translation — Sahih International
Rather, the Qur'an is distinct verses [preserved] within the breasts of those who have been given knowledge. And none reject Our verses except the wrongdoers.
Source
Kur'an-ı Kerim, Ankebût Suresi 29:49
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/29-suresi-49-ayet