Musannaf Ibn Abi Shaybah

Hazrat Mak’hool (may Allah have mercy on him) narrates that a man came to the service of the Holy Prophet ﷺ and said, “People have fought in the way of Allah and I was left behind due to some compulsion. Please tell me of an action by which I may become equal to them.” The Prophet ﷺ asked him, “Are you able to stand in prayer at night?” He replied, “I will do so.” The Prophet ﷺ then asked, “Are you able to fast every day?” The man replied, “Yes! I will do so.” The Prophet ﷺ said, “Your standing in prayer at night and fasting during the day cannot be equal to their sleep.”