Surah At-Tawbah · 9:78

أَلَمْ يَعْلَمُوٓا۟ أَنَّ ٱللَّهَ يَعْلَمُ سِرَّهُمْ وَنَجْوَىٰهُمْ وَأَنَّ ٱللَّهَ عَلَّـٰمُ ٱلْغُيُوبِ

“Do they not know that Allah [fully] knows their [evil] thoughts and secret talks, and that Allah is the Knower of all unseen?”

Reason for revelation & related events1

asbab al nuzul

Part of the well-established hypocrites-who-stayed-behind-from-Tabuk passage of Surat al-Tawbah.

أَلَمْ يَعْلَمُوٓا۟ أَنَّ ٱللَّهَ يَعْلَمُ سِرَّهُمْ وَنَجْوَىٰهُمْ وَأَنَّ ٱللَّهَ عَلَّـٰمُ ٱلْغُيُوبِ

“Do they not know that Allah [fully] knows their [evil] thoughts and secret talks, and that Allah is the Knower of all unseen?”

asbab al nuzul

Part of the well-established hypocrites-who-stayed-behind-from-Tabuk passage of Surat al-Tawbah.