Chapter 83: Oaths and Vows
Narrated 'Abdullah bin 'Umar: that he was asked about a man who had vowed that he would fast all the days of his life then the day
of 'Id al Adha or 'Id-al-Fitr came. 'Abdullah bin 'Umar said: You have indeed a good example in
Allah' s Messenger (ﷺ). He did not fast on the day of 'Id al Adha or the day of 'Id-al-Fitr, and we do not
intend fasting on these two days.
Sahih al-Bukhari 6705