In light of Ramadan approaching.
It was narrated that Aisha (Radiallhu anha) said: The Messenger of Allah (pbuh) used to fast until we thought he would not break his fast, and he used not to fast until we thought he would not fast. I never saw the Messenger of Allah (pbuh) fast a complete month except Ramadaan and I never saw him fast more than in Sha’baan.
[Narrated by al-Bukhaari, 1868; Muslim, 1165].