Book Name:Durood-o-Salaam Kay Fazail
اِنَّ اللّٰهَ وَ مَلٰٓىٕكَتَهٗ یُصَلُّوْنَ عَلَى النَّبِیِّؕ-یٰۤاَیُّهَا الَّذِیْنَ اٰمَنُوْا صَلُّوْا عَلَیْهِ وَ سَلِّمُوْا تَسْلِیْمًا(۵۶)
Translation from Kanz-ul-Iman: Indeed Allah and His angels send blessings on the Herald of the news of unseen (the Nabi); O Believers! Send blessings and abundant salutations upon him. (Part 22, Al-Ahzaab, Ayah 56)
It is stated in Tafseer Ruh-ul-Bayan that after the revelation of this blessed Ayah, the blessed face of the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم by virtue of bliss, became luminous and he صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم said, ‘Congratulate me because I have been given the blessed Ayah which I love more than ‘دُنْیا وَ مَا فِیْہا’ (i.e. the world and whatever is in it).’ (Ruh-ul-Bayan, vol. 7, pp. 223)
Mufti Ahmad Yar Khan رَحْمَةُ اللهِ تَعَالٰی عَلَيْه has said: This blessed Ayah is obviously a Na’at of the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم. Believers have been commanded to send Salat and Salam to the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم in this blessed Ayah. The most interesting aspect is that, Allah عَزَّوَجَلَّ has issued many commandments in the Holy Quran such as Salah, Sawm, Hajj, etc., etc., but nowhere has He عَزَّوَجَلَّ stated that I also carry out this act, My angels also do it and O believers! You should also do it. Allah عَزَّوَجَلَّ has only stated like this for Salat-‘Alan-Nabi alone. The reason behind this is very much clear because there is no such act which is carried out by Allah عَزَّوَجَلَّ and His bondman as well. Surely we cannot do the Divine works of Allah عَزَّوَجَلَّ and Allah عَزَّوَجَلَّ does not need our work. If there is an act which Allah عَزَّوَجَلَّ carries out, angels also perform and Muslims have also been commanded to do so, it is the only act of sending Salat to the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم. The way every one focuses their eyes on the moon of Eid, similarly every creature focuses their attention to the Beloved Rasool صَلَّى اللهُ تَعَالٰى عَلَيْهِ وَاٰلِهٖ وَسَلَّم and Allah عَزَّوَجَلَّ Himself extends His mercy to him. (Shan-e-Habib-ur-Rahman, pp. 183; summarized)