Prophet صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم had been taken into his enlightened grave. He has narrated, ‘I am the last person who saw the illuminated body of the Holy Prophet صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم in his blessed grave. I saw that the Holy Prophet صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم was moving his blessed lips so I brought my ears close to the blessed mouth of the Noble Prophet صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم. I heard that he صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم was saying رَبِّ هَبۡ لِيۡ اُمَّتِيۡ i.e. O my Lord! Hand over my Ummat to me. (Madārij-un-Nubūwwaĥ, Vol. 2, p. 442)
It has been narrated on page 178 of volume 7 of ‘Kanz-ul- ‘Ummāl, ‘The Sultan of Both Worlds, the Merciful Prophet صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم has stated, ‘After my apparent passing, I will continue to say يَا رَبِّ اُمَّتِيۡ اُمَّتِيۡ [O my Lord! my Ummat, my Ummat] in my grave, until the time of resurrection.’ (Kanz-ul-‘Ummāl)
Muḥaddiš-e-A’ẓam Pakistan said
The truth is that if he صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم had only said ‘Ummatī’ once, and if we were to say ‘Yā Nabī, Yā Nabī! Yā Rasūlallāĥ,