عَنْ مُوسَى بْنِ طَلْحَةَ، قَالَ سَأَلْتُ زَيْدَ بْنَ خَارِجَةَ قَالَ أَنَا سَأَلْتُ، رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَ “‏ صَلُّوا عَلَىَّ وَاجْتَهِدُوا فِي الدُّعَاءِ وَقُولُوا اللَّهُمَّ صَلِّ عَلَى مُحَمَّدٍ وَعَلَى آلِ مُحَمَّدٍ” ‏

Nasa’i 1292

It was narrated that Musa bin Talhaؓ said: “I asked Zaid bin Kharijahؓ who said: ‘I asked the Messenger of Allahﷺ 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 Muhammadﷺ and upon the family of Muhammadﷺ).’”