Narrated to us Abu Bakr ibn Abi Shaybah, narrated to us 'Ubaydullah ibn Musa, informed us Shayban, from Ash'ath ibn Abi al-Sha'tha', from Ja'far ibn Abi Thawr, from Jabir ibn Samurah — may Allah be pleased with him — who said: The Messenger of Allah, peace and blessings be upon him, used to command us to fast the day of 'Ashura', and he would urge us to do so and would check on us regarding it. But when Ramadan was made obligatory, he neither commanded us nor forbade us, nor did he check on us regarding it.