Sending prayers upon the Prophet on Friday
اللّهُـمَّ صَلِّ وَسَلِّمْ عَلى نَبِيِّنا مُحَمَّد
اللّهُـمَّ صَلِّ وَسَلِّمْ عَلى نَبِيِّنا مُحَمَّد
Allahumma salli wasallim AAala nabiyyina Muhammad
Translation
O Allah, send prayers and peace upon our Prophet Muhammad.
When to recite
Frequently recited on Fridays. The Prophet said: Send a great amount of prayers upon me on Fridays.
Source / Reference
Abu Dawud 1/275, Ibn Majah 1/345