📖 Aisha RadhiAllahu 'anha narrated: The Messenger of Allah SallAllahu 'alaihi wa sallam would fast until we said he will never break his fast, and he did not fast until we said he would never fast. I did not see the Prophet SallAllahu 'alaihi wa sallam complete an entire month of fasting except for Ramadan, and I did not see him complete more voluntary fasts than in the month of Sha’ban.
In another narration, Aisha RadhiAllahu 'anha said: The Prophet SallAllahu 'alaihi wa sallam would fast Sha’ban and then connect it to Ramadan.
Source: Sahih Al-Bukhari 1868
Sahih Muslim 1156
Grade: Muttafaqun Alayhi (Authenticity agreed upon) according to Al-Bukhari and Muslim
Al-Nawawi said, “It is part of the Sunnah to fast in the month of Sha’ban.”
Source: Al-Majmū’ Sharḥ Al-Muhadhab 6/386
📖 Umm Salamah RadhiAllahu 'anha narrated: I did not see the Prophet SallAllahu 'alaihi wa sallam fast for two consecutive months in a row except for Sha’ban and Ramadan.
Source: Sunan At-Tirmidhi 736
Grade: Sahih (Authentic) according to Al-Albani
📖 Sahl ibn Sa’d RadhiAllahu 'anhu narrated: Allah's noble Messenger Muhammad SallAllahu 'alaihi wa sallam said, "Verily, there is a gate in Paradise called Ar-Rayyaan, through which only those who fasted will enter on the Day of Resurrection. No one else will enter it along with them. It will be said: 'Where are those who fasted, so that they may enter?' When the last of them enters, it will be closed and no one else will go through it."
Source: Sahih Al-Bukhari 1797
Sahih Muslim 1152
Grade: Muttafaqun Alayhi (Authenticity agreed upon) according to Al-Bukhari and Muslim
📖 Usamah ibn Zayd RadhiAllahu 'anhu narrated: I said, “O Messenger of Allah, I do not see you fasting any month as much as you fast during Sha’baan.” The Prophet SallAllahu 'alaihi wa sallam said, "It is a month that people neglect between the months of Rajab and Ramadan. It is a month in which the deeds are raised to the Rabb (Lord) of the worlds and I like that my deeds are raised while I am fasting."
Source: Sunan Al-Nasā’ī 2357
Grade: Hasan (Fair) according to Al-Albani