Ali ibn al-Hasan ibn Faddal, from Harun ibn Muslim, from Masadah ibn Sadaqah, from Abu Abdillah عليه السلام, peace be upon him, who said: Imam al-Sadiq عليه السلام said: “Among the things that the Messenger of Allah سبحانه وتعالى, may Allah سبحانه وتعالى bless him and his family, used to do in the Month of Ramadan was that He صلى الله عليه وعلى آله وسلم would perform supererogatory prayers every night and would add to his regular prayers, that He صلى الله عليه وعلى آله وسلم used to pray before that from the first night until the completion of twenty nights. In every night, twenty rak’ahs; eight of them after Maghrib and twelve after the final Isha prayer. And Prophet صلى الله عليه وعلى آله وسلم would pray during the last ten nights every night thirty rak’ahs; twelve of them after Maghrib and eighteen after the final Isha prayer. He صلى الله عليه وعلى آله وسلم would supplicate and exert himself with great effort. And Prophet صلى الله عليه وعلى آله وسلم used to pray one hundred rak’ahs on the night of the twenty-first, and He صلى الله عليه وعلى آله وسلم would pray one hundred rak’ahs on the night of the twenty-third, and He صلى الله عليه وعلى آله وسلم would exert himself in both of them.”