Do you not know the interrogative here is meant as an affirmative that God knows all that is in the heaven and the earth? Truly that which has been mentioned is recorded in a Book namely the Preserved Tablet al-lawh al-mahfūz. Indeed that namely the knowledge of what has been mentioned is easy for God.
- 22:7070
أَلَمْ تَعْلَمْ أَنَّ اللَّهَ يَعْلَمُ مَا فِي السَّمَاءِ وَالْأَرْضِ ۗ إِنَّ ذَٰلِكَ فِي كِتَابٍ ۚ إِنَّ ذَٰلِكَ عَلَى اللَّهِ يَسِيرٌ
Do you not know that God knows whatever is in the heavens and the earth? This is surely in accordance with the law. This is certainly how (the law of) God works inevitably.
- common.revelation-Medinan
- common.hizb : 136