As for what was narrated by Muhammad ibn Ahmad ibn Yahya from Muhammad ibn Al-Husayn from Ja‘far ibn Bashir from ‘Ubayd from his father: Abu Ja‘far عليه السلام, peace be upon him, said: “The witr prayer is recorded in the Book of (Imam) Ali عليه السلام, peace be upon him, as obligatory (wajib); it is the witr of the night, and the Maghrib prayer is the witr of the day.”