Jibreel (Peace be upon him) came to the Holy Prophet (Sallallahu alaihi wa sallam) and gave glad tidings about those who pray in Shab Bara'at:
Translation of Hadith: Hadhrat Abu Hurairah (May Allah Ta’ala be well pleased with him) narrates from the Holy Prophet (Sallallahu alaihi wa sallam) that the Holy Prophet (Sallallahu alaihi wa sallam) said: On the 15th night of Sha'aban, Jibreel (Peace be upon him) came to me and said: O Embodiment of Praise (Muhammad, i.e. he did not use the name as name but as a form of praise) (Sallallahu alaihi wa sallam), raise your head towards the sky. I said: What night is this? Jibreel (Peace be upon him) said: This night, Allah (Subhanahu Wa Ta'ala) opens 300 doors of His mercy and forgives each person who does not associate anybody or anything with Him except that that person is a magician, sorcerer, habitual wine-drinker, habitual usurer or adulterous; these people are not forgiven unless until they repent. Then when a fourth of the night passed, Jibreel (Peace be upon him) again came and said: O Muhammad (Sallallahu alaihi wa sallam), raise your head. All the doors of Jannah are open. On the first door, an angel stands and calls out: Glad tidings for that person who performed a Ruku’ in this night; on the second door, an angel stands and cries out: Glad tidings for those who perform Sajdah in this night; on the 3rd door, an angel is calling out: Glad tidings for the one who supplicated (performs Dua) in this night; on the 4th door an angel is calling out: Glad tidings for the person who performs Dhikr in this night; on the 5th door, an angel is calling out: Glad tidings for the person who cries out of the fear of Allah (Subhanahu Wa Ta'ala) in this night; on the 6th door, an angel is calling out: Tonight, glad tidings for those who obey Allah (Subhanahu Wa Ta'ala); on the 7th door an angel is calling out: Is there anyone who asks for something that it may be given? And on the 8th door, an angel is calling out: Is there anyone who desires forgiveness that he/she may be forgiven?
I asked Jibreel (Peace be upon him): Until when will these doors be open? He said: From the beginning of the night to sunrise. Then Jibreel said: O Muhammad (Sallallahu alaihi wa sallam), Verily! This night Allah (Subhanahu Wa Ta'ala) forgives as many people as the hair of the goats of the clan of Kalb.
How delightful this news is that 300 doors of mercy are opened! The obedient slaves of Allah (Subhanahu Wa Ta'ala) surely get their share out of this mercy and fill their hearts and souls with spiritual bounties.
We see when the breeze blows before rain, what a beautiful atmosphere it creates and how comforting it is for the body and the hearts! We should consider that when the breeze of mercy flows from the divine realms, what kind of comfort and joy it will bring along with it. Even now, there are some on whom fate does not smile. They don’t have anything to do with the winds of mercy that blow. They are those whom heedlessness has enveloped. One drinks wine habitually, another one is a magician and yet another one is a usurer.