And it was narrated to us by ʿUbayd Allāh ibn Muʿādh: my father narrated to me: Shuʿbah narrated to us from Ḥabīb, who heard Abū al-ʿAbbās, who heard ʿAbd Allāh ibn ʿAmr — may God be pleased with them both — who said: The Messenger of God, peace and blessings be upon him, said to me: "O ʿAbd Allāh ibn ʿAmr, you fast continuously and pray through the night, and if you do that, the eye will become sunken and strength will be exhausted. He who fasts forever has not fasted. Fasting three days of every month is like fasting the whole month." I said: "But I am able to do more than that." He said: "Then fast the fast of Dāwūd — he used to fast one day and break his fast one day, and he would not flee when he met the enemy."