Chapter on the Detailed Explanation of Prayer, Including the Obligatory and Recommended, and What is Permissible and Not Permissible.

And from him, from Ibn Muskan, from Ya’qub al-Ahmar, who said: I asked Him عليه السلام about performing the night prayer at the beginning of the night. Imam عليه السلام said: "Excellent is what you have seen, and excellent is what you have done." Then Imam عليه السلام said: "Indeed, the youth sleeps a lot, so I command you to do this."