لَمْ يَكُنْ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي شَهْرٍ مِنَ السَّنَةِ أَكْثَرَ صِيَامًا مِنْهُ فِي شَعْبَانَ كَانَ يَصُومُ شَعْبَانَ كُلَّهُ .
It was narrated that Aishah said: "The Messenger of Allah did not fast in any month of the year more than he did in Shaban. He used to fast all of Shaban."