Original sentence: According to hadith record in Sahih Bukhari, Ashura was already known as a commemorative day during which some Makkah residents used to observe customary fasting.Muhammad fasted on the day of Ashura, 10th Muharram, in Makkah.When fasting during the month of Ramadan became obligatory, the fast of Ashura was made non-compulsory
Edited sentence: According to hadith record in Sahih Bukhari, Ashura was already known as a commemorative day during which Jewish Makkah residents used to observe customary fasting, due to the reason that the Prophet Musa (Moses, peace be upon him) was saved from the Pharoah on this very day.Prophet Muhammad (peace be upon him) fasted on the day of Ashura, 10th Muharram, saying to the effect that "we love Prophet Musa (PBUH) even more so than the Jews, so why shan't we fast in remembrance of this day also".When fasting during the month of Ramadan became obligatory, the fast of Ashura was made non-compulsory, but still of great reward