“I asked ‘Aishah about the
fasting of the Prophet (ﷺ). She said: ‘He used to fast until we
thought he would always fast. And he used to not fast until we
thought
he would always not fast. I never saw him fast more in any
month than
in Sha’ban. He used to fast all of Sha’ban; he used to
fast all of
Sha’ban except a little.’”
Sunan Ibn Majah Book 7, Hadith 73