Sahih al-Bukhari 877
Friday
The best day the sun rises upon.
Sunan al-Bayhaqi 5996 (sahih per al-Albani)
اللَّهُمَّ صَلِّ عَلَى مُحَمَّدٍ وَعَلَى آلِ مُحَمَّدٍ
Allahumma salli 'ala Muhammadin wa 'ala ali Muhammad
O Allah, send blessings upon Muhammad and upon the family of Muhammad.
Sunan Abi Dawud 1047 (sahih)
Sahih al-Bukhari 881
Sahih al-Bukhari 935