مَا قُلْتُ لَهُمْ إِلَّا مَآ أَمَرْتَنِى بِهِۦٓ أَنِ ٱعْبُدُوا۟ ٱللَّهَ رَبِّى وَرَبَّكُمْ ۚ وَكُنتُ عَلَيْهِمْ شَهِيدًا مَّا دُمْتُ فِيهِمْ ۖ فَلَمَّا تَوَفَّيْتَنِى كُنتَ أَنتَ ٱلرَّقِيبَ عَلَيْهِمْ ۚ وَأَنتَ عَلَىٰ كُلِّ شَىْءٍ شَهِيدٌ

I did not say to them aught save what Thou didst enjoin me with: That serve Allah, my Lord and your Lord, and I was a witness of them so long as I was among them, but when Thou didst cause me to die, Thou wert the watcher over them, and Thou art witness of all things.