It is narrated from Hazrat Jabir bin Samurah (may Allah be pleased with him) that in the beginning, the Prophet (peace and blessings be upon him) used to encourage and command us to fast on the tenth of Muharram, and he would have us act upon it. Later, when the fasting of the month of Ramadan was made obligatory, the Prophet (peace and blessings be upon him) neither commanded us regarding it, nor forbade it, nor had us act upon it.