Hadith 4:492
Ubayd Allah ibn Musa narrated to us, he said: Shayban informed us, from Ash'ath ibn Abi al-Sha'tha', from Ja'far ibn Abi Thawr, from Jabir ibn Samurah, who said: The Messenger of Allah (may Allah bless him and grant him peace) used to command us to fast the day of Ashura and urge us toward it, or he would check on us regarding it. Then, when Ramadan was made obligatory, he did not command us, nor did he forbid us from it, and he did not check on us regarding it.
حدثنا عبيد الله بن موسى قال أخبرنا شيبان عن أشعث بن أبي الشعثاء عن جعفر بن أبي ثور عن جابر بن سمرة قال كان رسول الله صلى الله عليه وسلم يأمرنا بصيام عاشوراء ويحثنا عليه أو يتعاهدنا عنده فلما فرض رمضان لم يأمرنا ولم ينهانا ( ( ( ينهنا ) ) ) عنه ولم يتعاهدنا عنده