Know that it is fasting on the day on which the command was received from the Prophet, may God bless him and grant him peace.

We narrated it on the authority of Abu Dawud, on the authority of Abdullah ibn al-Ala, on the authority of al-Mughirah ibn Qurrah, who said: Muawiyah said among the people on the day of Mashal, which At the gate of Homs, he said, “O people, we have seen the crescent on such-and-such a day, and I am beginning to fast. Whoever wants to do it, let him do it.” Then Malik bin Hubayra Al-Subli stood up to him and said, “O Muawiyah, is it something you heard from the Messenger of God, may God bless him and grant him peace, or something of your opinion?” He said , “I heard him from the Messenger of God, may God bless him and grant him peace, saying, ‘Fast the month and keep it secret. ’”