From him, from Yaqub ibn Yazid from Ibn Abi Umayr from Ibn Muskan from Abu Basir who said: I said to Abu Ja’far عليه السلام, peace be upon him: “(When praying) behind someone I do not follow in prayer, what should I do?” Imam عليه السلام said: “Finish (your recitation) before he finishes, for you are in confinement (hisar). If he finishes before you, then cut off your recitation and bow with him.”