Narrated Abu Huraira:

The Prophet said, "Beware of suspicion, for suspicion is the worst of false tales; and do not look for the others' faults and do not spy, and do not be jealous of one another, and do not desert (cut your relation with) one another, and do not hate one another; and O Allah's worshipers! Be brothers (as Allah has ordered you)!"

Virtues of Ramadan
Abu Hurayrah RA narrates that The Holy Prophet sallallahu alayhi wasallam said, "One who keeps the fast of Ramadhaan with Imaan (faith) and longing for reward, all his previous sins are forgiven." (Bukhari)

Abu Hurayrah RA reports that our beloved Prophet sallallahu alayhi wasallam, said, 'Allah says, 'Every deed of Ibne Aadam (son of Aadam) is for him, except for fast. Verily, fasting is for me, and I shall (personally) apportion out the reward for it."' It is further said, "For a fasting person, there are two pleasures, which please him. When he eats upon completing the fast, he becomes happy, and when he will meet his Lord he will be pleased due to his fast." (Bukhari)
Abdullah Ibn `Amr Ibn al-`Aas RA reported that the Messenger of Allah, salla Allahu alaihi wa sallam, said: "Indeed there is for the fasting person, when he breaks his fast, a supplication which is not rejected". (Ibn Majah)

The Prophet SAW said "Whoever establishes prayers during the nights of Ramadan (and that is called Qiyam) faithfully out of sincere faith and hoping to attain Allah's rewards (not for showing off), all his past sins will be forgiven." [Bukhari]

Sahl Ibne Sa'd radhiyallahu anhu narrates that The Prophet SAW said, "Verily! In Jannah, there is a door called ‘Ar Rayyaan’, through which will enter the fasting people on the Day of Judgement. No one will enter through this door besides them. It will be announced, 'Where are the fasting people?' They will stand (and enter). No one will enter besides them. Once they will enter, the door will be locked so no one can enter through it (after them)." (Bukhari)

Abu Huraira (RA) narrates that The Holy Prophet SAW said: " Allah says ' I am with my servant when he remembers me and his lips quiver in my remembrance.' " (Ibn Majah, as sunan)

Sahih Bukhari, Volume 3, Book 32, Number 227:

Narrated Abu Huraira:

Allah's Apostle said, "Whoever prayed at night the whole month of Ramadan out of sincere Faith and hoping for a reward from Allah, then all his previous sins will be forgiven." Ibn Shihab (a sub-narrator) said, "Allah's Apostle died and the people continued observing that (i.e. Nawafil offered individually, not in congregation), and it remained as it was during the Caliphate of Abu Bakr and in the early days of 'Umar's Caliphate." 'Abdur Rahman bin 'Abdul Qari said, "I went out in the company of 'Umar bin Al-Khattab one night in Ramadan to the mosque and found the people praying in different groups. A man praying alone or a man praying with a little group behind him. So, 'Umar said, 'In my opinion I would better collect these (people) under the leadership of one Qari (Reciter) (i.e. let them pray in congregation!)'. So, he made up his mind to congregate them behind Ubai bin Ka'b. Then on another night I went again in his company and the people were praying behind their reciter. On that, 'Umar remarked, 'What an excellent Bid'a (i.e. innovation in religion) this is; but the prayer which they do not perform, but sleep at its time is better than the one they are offering.' He meant the prayer in the last part of the night. (In those days) people used to pray in the early part of the night."

Abdullah ibn Masud narrates that The Prophet SAW said: " Do not wish to be like anyone except in two cases- A person, whom Allah has given wealth and he spends it righteously and the one whom Allah has given wisdom and he acts according to it and teaches it to others." (Bukhari, Vol 3, Book 1, Hadith no. 73)