“The Messenger of Allah (ﷺ) used to fast until we thought he would never stop fasting. And he used to not fast until we thought we would never fast. And he never fasted any complete month apart from Ramadan, from the time he came to Al- Madinah.”
Sunan Ibn Majah Book 7, Hadith 74
← Previous Hadith “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 Next Hadith → “The most beloved fast to Allah is the fast of Dawud, for he used to fast one day and not the next. And the most beloved of prayer to Allah is the prayer of Dawud; he used to sleep half of the night, pray one-third of the night and sleep one-sixth of the night.”

Sunan Ibn Majah Book 7, Hadith 75