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 خَالَفَهُ خَالِدُ بْنُ سَلَمَةَ  

[Machine] I heard Musa ibn Talhah and Abdul Hamid asked him, "How is the prayer upon the Prophet ﷺ?" Musa answered, "I asked Zaid ibn Kharijah al-Ansari who said, 'I asked the Messenger of Allah ﷺ and I said, 'O Messenger of Allah, how is the prayer upon you?' He replied, 'Say, 'O Allah, bless Muhammad and the family of Muhammad as You blessed the family of Ibrahim. Surely, You are worthy of praise and glory.'"  

سَمِعْتُ مُوسَى بْنَ طَلْحَةَ وَسَأَلَهُ عَبْدُ الْحَمِيدِ كَيْفَ الصَّلَاةُ عَلَى النَّبِيِّ ﷺ؟ قَالَ سَأَلْتُ زَيْدَ بْنَ خَارِجَةَ الْأَنْصَارِيَّ قَالَ سَأَلْتُ رَسُولَ اللهِ ﷺ فَقُلْتُ يَا رَسُولَ اللهِ كَيْفَ الصَّلَاةُ عَلَيْكَ؟ قَالَ صَلَّوْا عَلَيَّ ثُمَّ قُولُوا اللهُمَّ بَارِكْ عَلَى مُحَمَّدٍ وَآلِ مُحَمَّدٍ كَمَا بَارَكْتَ عَلَى آلِ إِبْرَاهِيمَ إِنَّكَ حَمِيدٌ مَجِيدٌ