Sa’ad ibn Abdullah, from Imran ibn Musa and Ali ibn Khalid, from Harun, from al-Hasan ibn Mahbub, from Yahya ibn al-Mubarak, from Abdullah ibn Jundab, from Samaah ibn Mihran, from Abu Basir, from Abu Abdillah عليه السلام, peace be upon him, who said: I (narrator) said to Imam عليه السلام: “The elderly man is not able to fast.” Imam عليه السلام said: “Some of his children fast on his behalf.” I (narrator) asked: “But if he has no children?” Imam عليه السلام said: “Then his nearest relative.” I (narrator) asked: “But if he has no relative?” Imam عليه السلام said: “He gives a mudd in charity for each day. But if he does not have anything with him, then there is nothing upon him.”