Chapter on the Manner of Prayer, Explanation of the Fifty-One Rak‘ahs; The Order, Recitation, Tasbih in Bowing and Prostration, Qunut, and What is Obligatory and Recommended Therein

Ahmad ibn Muhammad ibn Isa from Ali ibn al-Hakam from Sayf from Abu Bakr al-Hadrami, who said: I asked Abu Abdillah عليه السلام, peace be upon him, and said: "When should I perform the two rak‘ahs of Fajr?" Imam عليه السلام said: "When the dawn appears across the horizon, and that is what the Arabs call 'al-Sadi‘ (the splitter of the night).”