As for what was narrated by Muhammad ibn Ya‘qub, from Ali ibn Ibrahim, from his father, from Ibn Abi Umayr, from Ja‘far ibn Ali, who said: I saw Aba al-Hasan عليه السلام, peace be upon him, and He عليه السلام had performed a prostration after the prayer, and He عليه السلام spread his forearms on the ground and pressed his chest to the ground, while still in his clothes.