Did they not know that Allah knows their secrets and their private conversations and that Allah is the Knower of the unseen?
The Saheeh International Quran Translation
أَلَمْ يَعْلَمُوٓا۟ أَنَّ ٱللَّهَ يَعْلَمُ سِرَّهُمْ وَنَجْوَىٰهُمْ وَأَنَّ ٱللَّهَ عَلَّٰمُ ٱلْغُيُوبِDid they not know that Allah knows their secrets and their private conversations and that Allah is the Knower of the unseen?