Ash-Shama'il Al-Muhammadiyah — Hadith #48036

Harun bin Ishaq Al-Hamdani told us, he said: Abdah bin Sulayman told us, on the authority of Hisham bin Urwa, on the authority of his father, on the authority of Aisha, She said: Ashura was a day that the Quraysh fasted in pre-Islamic times, and the Messenger of God, may God bless him and grant him peace, used to fast on it, so when he came to Medina, he fasted on it. He commanded his fasting, so when Ramadan was assumed, Ramadan was the obligatory prayer, and he left Ashura, so whoever wanted to fasted it, and whoever wanted to left it.