Sunan Ibn Majah Book 5, Hadith 905

حَدَّثَنَا عَمَّارُ بْنُ طَالُوتَ، حَدَّثَنَا عَبْدُ الْمَلِكِ بْنُ عَبْدِ الْعَزِيزِ الْمَاجِشُونُ، حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرِ بْنِ مُحَمَّدِ بْنِ عَمْرِو بْنِ حَزْمٍ، عَنْ أَبِيهِ، عَنْ عَمْرِو بْنِ سُلَيْمٍ الزُّرَقِيِّ، عَنْ أَبِي حُمَيْدٍ السَّاعِدِيِّ، أَنَّهُمْ قَالُوا يَا رَسُولَ اللَّهِ أُمِرْنَا بِالصَّلاَةِ عَلَيْكَ فَكَيْفَ نُصَلِّي عَلَيْكَ فَقَالَ ‏ "‏ قُولُوا اللَّهُمَّ صَلِّ عَلَى مُحَمَّدٍ وَأَزْوَاجِهِ وَذُرِّيَّتِهِ، كَمَا صَلَّيْتَ عَلَى إِبْرَاهِيمَ، وَبَارِكْ عَلَى مُحَمَّدٍ وَأَزْوَاجِهِ وَذُرِّيَّتِهِ، كَمَا بَارَكْتَ عَلَى آلِ إِبْرَاهِيمَ فِي الْعَالَمِينَ، إِنَّكَ حَمِيدٌ مَجِيدٌ ‏"‏ ‏.‏

It was narrated from Abu Humaid As-Sa’di that they said:“O Messenger of Allah! We have been commanded to send peace and blessings upon you. How should we send peace and blessings upon you?” He said: “Say: Allahumma salli ‘ala Muhammadin wa azwajihi wa dhurriyatihi, kama sallayta ‘ala Ibrahim; wa barik ‘ala Muhammadin wa azwajihi wa dhurriyatihi kama barakta ‘ala ali Ibrahim fil-‘alamin, innaka Hamidum Majid (O Allah, send Your grace, honour and mercy upon Muhammad and his wives and offspring, as You sent Your grace, honour and mercy upon Ibrahim. O Allah, send Your blessings upon Muhammad and his wives and offspring, as You sent Your blessings upon the family of Ibrahim among the nations, You are indeed Praiseworthy, Most Glorious).”