Quran 85:7 from Surah Al-Burooj on Divine Marvels.
وَهُمۡ عَلَىٰ مَا يَفۡعَلُونَ بِٱلۡمُؤۡمِنِينَ شُهُودٞ
English translation: And they over what they were doing to the believers witnesses
Transliteration: wahum ala ma yaf 'aluna bil-mu'minina shuhudun