Muhammad ibn Yaqub, from Ali ibn Ibrahim, from his father, and Muhammad ibn Ismail, from al-Fadl ibn Shadhan, all together from Ibn Abi Umayr, from Hisham ibn al-Hakam, from Abu Abdillah عليه السلام, peace be upon him, who said: Imam عليه السلام said: “The hire-carrier (al-mukari) and the camel-driver (al-jammal), who goes back and forth and has no place of residence, thus he completes the prayer and fasts the month of Ramadan.”