166لٰكِنِ اللَّهُ يَشهَدُ بِما أَنزَلَ إِلَيكَ ۖ أَنزَلَهُ بِعِلمِهِ ۖ وَالمَلائِكَةُ يَشهَدونَ ۚ وَكَفىٰ بِاللَّهِ شَهيدًاZafar Ansari(Whether people believe or not) Allah bears witness that whatever He has revealed to you, He has revealed with His knowledge, and the angels bear witness to it too, though the witness of Allah is sufficient.