Surah Ghafir, Verse 28
وَقَالَ رَجُلٌۭ مُّؤْمِنٌۭ مِّنْ ءَالِ فِرْعَوْنَ يَكْتُمُ إِيمَٰنَهُۥٓ أَتَقْتُلُونَ رَجُلًا أَن يَقُولَ رَبِّىَ ٱللَّهُ وَقَدْ جَآءَكُم بِٱلْبَيِّنَٰتِ مِن رَّبِّكُمْ ۖ وَإِن يَكُ كَٰذِبًۭا فَعَلَيْهِ كَذِبُهُۥ ۖ وَإِن يَكُ صَادِقًۭا يُصِبْكُم بَعْضُ ٱلَّذِى يَعِدُكُمْ ۖ إِنَّ ٱللَّهَ لَا يَهْدِى مَنْ هُوَ مُسْرِفٌۭ كَذَّابٌۭ
Translation — Sahih International
And a believing man from the family of Pharaoh who concealed his faith said, "Do you kill a man [merely] because he says, 'My Lord is Allah' while he has brought you clear proofs from your Lord? And if he should be lying, then upon him is [the consequence of] his lie; but if he should be truthful, there will strike you some of what he promises you. Indeed, Allah does not guide one who is a transgressor and a liar.
Source
Kur'an-ı Kerim, Mü'min Suresi 40:28
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/40-suresi-28-ayet