Al-Husayn ibn Said, from Fadalah, from Aban ibn Uthman, from Muhammad ibn Muslim, from Abu Ja’far عليه السلام, peace be upon him, who said: I (narrator) asked Imam عليه السلام about’ fasting the day of Arafah.’ Imam عليه السلام said: “Whoever has strength for it, then it is good, if it does not prevent you from supplication, for it is a day of supplication and asking, so fast it. And if you fear that you will become weak from that, then do not fast it.”