Chapter on the Detailed Explanation of Prayer, Including the Obligatory and Recommended, and What is Permissible and Not Permissible.

And from him, from al-Husayn ibn Muhammad, from Abdullah ibn ‘Amir, from Ali ibn Mahziyar, from Fadalah, from Aban, from Zurarah, from Abu Ja’far عليه السلام, who said: I said to Him عليه السلام: “A man prays while sitting and recites a surah, then when he wishes to conclude it, he stands and bows (‘rak’ah’) at its end.” Imam عليه السلام said: "His prayer is considered the prayer of one who stands."