Surah At-Tawbah, ayah 78

أَلَمۡ يَعۡلَمُوٓاْ أَنَّ ٱللَّهَ يَعۡلَمُ سِرَّهُمۡ وَنَجۡوَىٰهُمۡ وَأَنَّ ٱللَّهَ عَلَّٰمُ ٱلۡغُيُوبِ ٧٨

Alam ya'lamū annallāha ya'lamu sirrahum wanajwāhum wa annallāha 'allāmul-ghuyūb

Did they not know that Allāh knows their secrets and their private conversations and that Allāh is the Knower of the unseen?