Al-Husayn ibn Sa’id, from Safwan ibn Yahya, from Hammad ibn Uthman, from Abu al-Hasan عليه السلام, peace be upon him, who said: I asked Him عليه السلام about a man who prays while sitting. Imam عليه السلام said: "If you want to pray while sitting and have it counted for you as the prayer of one who stands, then recite while sitting. When you reach the end of the surah, stand up, complete it, and bow. That will be counted for you as the prayer of one who stands."