Chapter on the Manner of Prayer, Explanation of the Fifty-One Rak‘ahs; The Order, Recitation, Tasbih in Bowing and Prostration, Qunut, and What is Obligatory and Recommended Therein

And from him, from Umar ibn Ali ibn Umar, from his uncle Muhammad ibn Umar, from someone who narrated to him: Abu Abdillah عليه السلام said: “Indeed, if Allah سبحانه وتعالى, Mighty and Majestic, has said: ‘Wealth and children are the adornment of the life of this world’ (Surah Kahf 18:46), then surely eight rak‘ahs which the servant prays at the end of the night are the adornment of the Hereafter.”