Our mother of believer Aisha (Allahs blessings be on her) said: “The Messenger(peace be upon him)used to fast until we thought that he would never break his fast, and he would not fast until we thought he would never fast. I never saw the Messenger of Allah (peace be upon him) fasting for an entire month except in Ramadhan, and I never saw him fast more than he did in Sha’baan.” (Al-Bukhari)