Musnad Abu Ya'la al-Mawsili 108:169

Abu Bakr narrated to us, Husayn ibn Ali narrated to us, from Za'idah, from Sulayman, from Abu Sufyan, from Jabir, who said: The Messenger of Allah (may Allah bless him and grant him peace) prepared an army until it was the middle of the night, or it reached that point. Then he came out to us and said: "The people have prayed and slept, while you have been waiting for this prayer. As for you, you will remain in a state of prayer as long as you are waiting for it."