Sura al-Māʾidah 5:117

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

mā qultu lahum illā mā amartanī bihi ani iʿbudū allāha rabbī wa-rabbakum wa-kuntu ʿalayhim shahīdan mā dumtu fīhim fa-lammā tawaffaytanī kunta anta l-raqība ʿalayhim waanta ʿalā kulli shayʾin shahīdun

"Never said I to them aught except what Thou didst command me to say, to wit, 'worship Allah, my Lord and your Lord'; and I was a witness over them whilst I dwelt amongst them; when Thou didst take me up Thou wast the Watcher over them, and Thou art a witness to all things.