´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."
Hadith ReferenceSunan an-Nasa'i / The Book of Fasting / Hadith: 2182
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:متفق عليه