Hadith on Saum
Devils are chained during Ramadan
“When the month of Ramadan starts, the gates of the heaven are opened and the gates of Hell are closed and the devils are chained.” (Imam Bukhari)
Past sins are forgiven
Narrated Abu Huraira(r.a): The Messenger of Allah (saw) said:”… whoever fasts during Ramadan out of sincere faith and hoping to attain Allah’s rewards, then all his past sins will be forgiven.” (Imam Bukhari).
Deliverance from Hellfire
Abu Said al-Khudri reported that the Messenger of Allah (saw), said: “No servant fasts on a day in the path of Allah except that Allah removes the hellfire seventy years further away from his face.” This is related by “the group,” except for Imam Abu Dawud.
There are in the month of Ramadhan in every day and night those to whom Allah grants freedom from the Fire, and there is for every Muslim a supplication which he can make and will be granted.” [al-Bazzaar, Ahmad, Saheeh]
Intercessors for the believers
`Abdullah ibn `Amr reported that the Messenger of Allah (saw), said: “The fast and the Qur’an are two intercessors for the servant of Allah on the Day of Resurrection. The fast will say: ‘O Lord, I prevented him from his food and desires during the day. Let me intercede for him.’ The Qur’an will say: ‘I prevented him from sleeping at night. Let me intercede for him.’ And their intercession will be accepted.” [Imam Ahmad]
Fasting is a shield
“Fasting is a shield with which a servant protects himself from the Fire.” [Imam Ahmad, Saheeh]
Paradise is the reward
Abu Umamah reported: “I came to the Messenger of Allah (saw) and said: ‘Order me to do a deed that will allow me to enter Paradise.’ He said: ‘Stick to fasting, as there is no equivalent to it.’ Then I came to him again and he said: ‘Stick to fasting.”‘ [Imam Ahmad, Imam Nasa’i, and Imam Hakim].
Sahl ibn Sa’d reported that the Messenger of Allah (saw): “There is a gate to Paradise that is called ar-Rayyan. On the Day of Resurrection it will say: ‘Where are those who fasted?’ When the last [one] has passed through the gate, it will be locked.” [Imam Bukhari and Imam Muslim].
Every good deed gets rewarded manifold during Ramadan
Every action of the son of Adam is given manifold reward, each good deed receiving then times its like, up to seven hundred times. Allah the Most High said, ‘Except for fasting, for it is for Me and I will give recompense for it, he leaves off his desires and his food for Me.’ for the fasting person there are two times of joy; a time when he breaks his fast and a time of joy when he meets his Lord, and the smell coming from the mouth of the fasting person is better with Allah than the smell of musk.” [Imam Bukhari]
The reward for food for fasting
The Messenger of Allah (saw) said: He who gives food for a fasting person to break his fast, he will receive the same reward as him, except that nothing will be reduced from the fasting person reward.” [Ahmad, at-Tirmidhee, Ibn Maajah, Ibn Hibbaan, Saheeh].