And Ibn Abi 'Umar narrated to me, saying: Sufyan narrated to us, from Ayyub, from 'Abdullah ibn Sa'id ibn Jubayr, from his father, from Ibn 'Abbas — may Allah be pleased with them both — that the Messenger of Allah, peace and blessings be upon him, arrived in Medina and found the Jews fasting on the day of 'Ashura'. The Messenger of Allah, peace and blessings be upon him, said to them: "What is this day on which you are fasting?" They replied: "This is a great day on which Allah saved Moses and his people, and drowned Pharaoh and his people. So Moses fasted it in gratitude, and we fast it." The Messenger of Allah, peace and blessings be upon him, said: "We have more right and are more deserving of Moses than you." So the Messenger of Allah, peace and blessings be upon him, fasted it and commanded that it be fasted.