Ali ibn al-Hasan ibn Faddal, from Ahmad ibn al-Hasan, from his father, from Ali ibn al-Hasan ibn Ribat, from al-Ala, from Muhammad ibn Muslim, from Abu Ja’far عليه السلام, peace be upon him, who said: I (narrator) asked Imam عليه السلام about ‘shortening (the prayer).’ Imam عليه السلام said: “In one barid.” He (narrator) said: “I asked, ‘One barid?’” Imam عليه السلام said: “Indeed, when he goes one barid and returns one barid, it occupies his day.”