Surah Al-Baqarah 2:77

أَوَلَا يَعْلَمُونَ أَنَّ ٱللَّهَ يَعْلَمُ مَا يُسِرُّونَ وَمَا يُعْلِنُونَ

But do they not know that Allāh knows what they conceal and what they declare?

Translation: Saheeh International

Tafsir

God says Know they not the interrogative is affirmative the inserted wāw of a-wa-lā is to indicate the supplement that God knows what they keep secret and what they proclaim? that is what they hide and what they reveal in this matter and all other matters so that they may desist from these things.

Excerpt from Tafsir al-Jalalayn, commentary on 2:77, via Quran.com. The reader has the full commentary and 9 more tafsirs.