During the Pre-lslamic Period of ignorance the Quraish used to observe fasting on the day of 'Ashura', and the Prophet himself used to observe fasting on it too. But when he came to Medina, he fasted on that day and ordered the Muslims to fast on it. When (the order of compulsory fasting in ) Ramadan was revealed, fasting in Ramadan became an obligation, and fasting on 'Ashura' was given up, and who ever wished to fast (on it) did so, and whoever did not wish to fast on it, did not fast.

Allah's Apostle said, "Whoever observes fasts during the month of Ramadan out of sincere faith, and hoping to attain Allah's rewards, then all his past sins will be forgiven."

The Prophet said, "Whoever established prayers on the night of Qadr out of sincere faith and hoping for a reward from Allah, then all his previous sins will be forgiven; and whoever fasts in the month of Ramadan out of sincere faith, and hoping for a reward from Allah, then all his previous sins will be forgiven."

The people used to fast on the day of 'Ashura' before fasting in Ramadan was prescribed but when (the order of compulsory fasting in) Ramadan was revealed, it was up to one to fast on it (i.e. 'Ashura') or not.

'Ashura' (i.e. the tenth of Muharram) was a day on which the tribe of Quraish used to fast in the prelslamic period of ignorance. The Prophet also used to fast on this day. So when he migrated to Medina, he fasted on it and ordered (the Muslims) to fast on it. When the fasting of Ramadan was enjoined, it became optional for the people to fast or not to fast on the day of Ashura.

The Prophet said, "Whoever fasted the month of Ramadan out of sincere Faith (i.e. belief) and hoping for a reward from Allah, then all his past sins will be forgiven, and whoever stood for the prayers in the night of Qadr out of sincere Faith and hoping for a reward from Allah, then all his previous sins will be forgiven ."

'A'isha (Allah be pleased with her) reported that the Messenger of Allah (may peace be upon him) had ordered to observe fast (on 'Ashura) before the fasting in Ramadan was made obligatory. But when it became obligatory, then he who wished fasted on the day of Ashura, and he who wished did not observe it (on that day).

Ibn `Abbas said, "Allah's Apostle travelled in the month of Ramadan and he fasted till he reached (a place called) 'Usfan, then he asked for a tumbler of water and drank it by the daytime so that the people might see him. He broke his fast till he reached Mecca." Ibn `Abbas used to say, "Allah's Apostle fasted and sometimes did not fast while traveling, so one may fast or may not (on journeys)"

Abu Dawud said: This tradition has been transmitted by 'Uqail, Yunus, and Abu Uwais in like manner. The version of 'Uqail goes: He who fasts during Ramadan and prays during the night.

Ibn `Abbas said, "Allah's Apostle set out from Medina to Mecca and he fasted till he reached 'Usfan, where he asked for water and raised his hand to let the people see him, and then broke the fast, and did not fast after that till he reached Mecca, and that happened in Ramadan." Ibn `Abbas used to say, "Allah's Apostle (sometimes) fasted and (sometimes) did not fast during the journeys so whoever wished to fast could fast, and whoever wished not to fast, could do so."

Fasting was observed on the day of 'Ashura' (i.e. 10th of Muharram) by the people of the Pre-lslamic Period. But when (the order of compulsory fasting) in the month of Ramadan was revealed, the Prophet said, "It is up to one to fast on it (i.e. day of 'Ashura') or not."

Allah's Apostle ordered (the Muslims) to fast on the day of 'Ashura', and when fasting in the month of Ramadan was prescribed, it became optional for one to fast on that day ('Ashura') or not.

Quraish used to fast on the day of 'Ashura' in the Pre-Islamic period, and Allah's Apostle too, used to fast on that day. When he came to Medina, he fasted on that day and ordered others to fast, too. Later when the fasting of the month of Ramadan was prescribed, he gave up fasting on the day of 'Ashura' and it became optional for one to fast on it or not.

The Prophet said, "Whoever believes in Allah and His Apostle offers prayers perfectly and fasts (the month of) Ramadan then it is incumbent upon Allah to admit him into Paradise, whether he emigrates for Allah's cause or stays in the land where he was born." They (the companions of the Prophet) said, "O Allah's Apostle! Should we not inform the people of that?" He said, "There are one-hundred degrees in Paradise which Allah has prepared for those who carry on Jihad in His Cause. The distance between every two degrees is like the distance between the sky and the Earth, so if you ask Allah for anything, ask Him for the Firdaus, for it is the last part of Paradise and the highest part of Paradise, and at its top there is the Throne of Beneficent, and from it gush forth the rivers of Paradise."

The Prophet said, "Whoever believes in Allah and His Apostle, offer prayer perfectly and fasts the month of Ramadan, will rightfully be granted Paradise by Allah, no matter whether he fights in Allah's Cause or remains in the land where he is born." The people said, "O Allah's Apostle ! Shall we acquaint the people with the is good news?" He said, "Paradise has one-hundred grades which Allah has reserved for the Mujahidin who fight in His Cause, and the distance between each of two grades is like the distance between the Heaven and the Earth. So, when you ask Allah (for something), ask for Al-firdaus which is the best and highest part of Paradise." (i.e. The sub-narrator added, "I think the Prophet also said, 'Above it (i.e. Al-Firdaus) is the Throne of Beneficent (i.e. Allah), and from it originate the rivers of Paradise.")

The Prophet (saws) as saying: If anyone fasts during Ramadan because of faith and in order to seek his reward from Allah, his previous sins will be forgiven to him. If anyone prays in the night of the power (lailat al-qadr) because of faith and in order to seek his reward from Allah his previous sins will be forgiven for him.

Abu Dawud said: This tradition has been transmitted in a similar manner by Yahya b. Abi Kathir and Muhammad b. 'Amr from Abu Salamah.