I prayed over a dead person along with Ibn 'Abbas. He recited Surat al-Fatihah and he said: This is the Sunnah.  

صَلَّيْتُ مَعَ ابْنِ عَبَّاسٍ عَلَى جَنَازَةٍ فَقَرَأَ بِفَاتِحَةِ الْكِتَابِ فَقَالَ إِنَّهَا مِنَ السُّنَّةِ