Surah Al-An'aam, Verse 114
أَفَغَيْرَ ٱللَّهِ أَبْتَغِى حَكَمًۭا وَهُوَ ٱلَّذِىٓ أَنزَلَ إِلَيْكُمُ ٱلْكِتَٰبَ مُفَصَّلًۭا ۚ وَٱلَّذِينَ ءَاتَيْنَٰهُمُ ٱلْكِتَٰبَ يَعْلَمُونَ أَنَّهُۥ مُنَزَّلٌۭ مِّن رَّبِّكَ بِٱلْحَقِّ ۖ فَلَا تَكُونَنَّ مِنَ ٱلْمُمْتَرِينَ
Translation — Sahih International
[Say], "Then is it other than Allah I should seek as judge while it is He who has revealed to you the Book explained in detail?" And those to whom We [previously] gave the Scripture know that it is sent down from your Lord in truth, so never be among the doubters.
Source
Kur'an-ı Kerim, En'âm Suresi 6:114
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/6-suresi-114-ayet