اَللَّهُمَّ صَلِّ عَلَى سَيِّدِنَا مُحَمَّدٍ النَّبِيِّ الْأُمِّيِّ وَعَلَى آلِهِ وَصَحْبِهِ وَسَلِّمْ
Transliteration
Allahumma salli 'ala sayyidina Muhammadin an-nabiyyil-ummiyyi wa 'ala alihi wa sahbihi wa sallim
English meaning
O Allah, send blessings and peace upon our master Muhammad, the unlettered Prophet, and his family and companions.
When is it recited?
Recited 80 times on Friday.
Its virtue
Whoever recites 80 salawat on Friday will have 80 years of sins forgiven.
Source
Daraqutni; Friday salawat