Surah Az Zukhruf Tafseer

أَمْ يَحْسَبُونَ أَنَّا لَا نَسْمَعُ سِرَّهُمْ وَنَجْوَاهُم

Or do they think that We hear not their secrets and their private counsel?

meaning, what they say secretly and openly.

بَلَى وَرُسُلُنَا لَدَيْهِمْ يَكْتُبُونَ

Yes (We do) and Our messengers are by them, to record.

means, `We know what they are doing, and the angels are also recording their deeds, major and minor.