His father said: "We said: 'O Messenger of Allah, how should we send salah upon you?' He said: 'Say: Alahumma salli 'ala Muhammad wa 'ala ali Muhammad, kama sallaita 'ala Ibrahima wa barik 'ala Muhammad kama barakta 'ala ali Ibrahim fil-'alamin, innaka hamidun majid (O Allah, send salah upon Muhammad and upon the family of Muhammad, as You sent salah upon the family of Ibrahim, and send blessings upon Muhammad and upon the family of Muhammad as You sent blessings upon the family of Ibrahim among the nations. You are indeed Worthy of praise, Full of glory.)'" (Using translation from Nasāʾī 1290)  

قُلْنَا يَا رَسُولَ اللهِ كَيْفَ الصَّلَاةُ عَلَيْكَ؟ قَالَ «قُولُوا اللهُمَّ صَلِّ عَلَى مُحَمَّدٍ كَمَا صَلَّيْتَ عَلَى إِبْرَاهِيمَ وَآلِ إِبْرَاهِيمَ إِنَّكَ حَمِيدٌ مَجِيدٌ وَبَارِكْ عَلَى مُحَمَّدٍ وَعَلَى آلِ مُحَمَّدٍ كَمَا بَارَكْتَ عَلَى إِبْرَاهِيمَ وَآلِ إِبْرَاهِيمَ إِنَّكَ حَمِيدٌ مَجِيدٌ»  

I said: “O Messenger of Allah ﷺ, how do we send blessings upon you?” He said: ʿSay: O Allah, send Your salah (grace, honour and mercy) upon Muhammad and upon the family of Muhammad, as You sent Your salah upon the family of Ibrahim, You are indeed Praiseworthy, Most Glorious. And send Your blessings upon Muhammad and the family of Muhammad, as You sent Your blessings upon the family of Ibrahim, You are indeed Praiseworthy, Most Glorious.” (Using translation from Aḥmad 1396)   

كَيْفَ نُصَلِّي عَلَيْكَ يَا نَبِيَّ اللهِ قَالَ قُولُوا «اللهُمَّ صَلِّ عَلَى مُحَمَّدٍ كَمَا صَلَّيْتَ عَلَى إِبْرَاهِيمَ إِنَّكَ حَمِيدٌ مَجِيدٌ وَبَارِكْ عَلَى مُحَمَّدٍ وَعَلَى آلِ مُحَمَّدٍ كَمَا بَارَكْتَ عَلَى إِبْرَاهِيمَ إِنَّكَ حَمِيدٌ مَجِيدٌ»  

"I asked Zaid bin Kharijah who said: 'I asked the Messenger of Allah ﷺ and he said: Send salah upon me and strive hard in supplication, and say: Alahumma salli 'ala Muhammad wa 'ala ali Muhammad (O Allah, send salah upon Muhammad and upon the family of Muhammad).'" (Using translation from Nasāʾī 1292)  

أَنَا سَأَلْتُ رَسُولَ اللهِ ﷺ فَقَالَ صَلَّوْا عَلَيَّ وَاجْتَهِدُوا فِي الدُّعَاءِ وَقُولُوا اللهُمَّ صَلِّ عَلَى مُحَمَّدٍ وَآلِ مُحَمَّدٍ  

“We said: ‘O Messenger of Allah! We know what it means to send greetings upon you, but what does it mean to send peace and blessings upon you?’ He said: ‘Say: “Allahumma salli ‘ala Muhammadin ‘abdika wa Rasulika kama salayta ‘ala Ibrahima, wa barik ‘ala Muhammad (wa ‘ala ali Muhammadin) kama barakta ‘ala Ibrahima [O Allah, send Your grace, honor and mercy upon Muhammad, Your slave and Messenger, as You sent Your (grace, honour and mercy) upon Ibrahim, and send Your blessings upon Muhammad (and the family of Muhammad) as You sent Your blessings upon Ibrahim].” (Using translation from Ibn Mājah 903)  

قُلْنَا يَا رَسُولَ اللهِ هَذَا التَّسْلِيمُ عَلَيْكَ قَدْ عَرَفْنَاهُ فَكَيْفَ الصَّلَاةُ عَلَيْكَ؟ قَالَ «قُولُوا اللهُمَّ صَلِّ عَلَى مُحَمَّدٍ عَبْدِكَ وَرَسُولِكَ كَمَا صَلَّيْتَ عَلَى إِبْرَاهِيمَ وَبَارِكْ عَلَى مُحَمَّدٍ وَآلِ مُحَمَّدٍ كَمَا بَارَكْتَ عَلَى إِبْرَاهِيمَ»