Sayyid Ibn Tawus quoted Imam al-Hasan al-’Askari(a.s.) to have said: In the books of my forefathers (a.s.), I have read that whoever offers on Saturdays a four unit prayer; reciting in each unit Surah al-Faatehah, Surah al-Tawheed, and Ayah al-Kursi, Allah the Almighty and All-majestic will grant him the rank of the Prophets, the martyrs, and the righteous people. How excellent the company of these is!