(68) باب صِيَامِ أَيَّامِ التَّشْرِيقِ
Narrated Ibn `Umar:
Fasting for those who perform ,Hajj-at-Tamattu` (in lieu of the Hadi which they cannot afford) may be performed up to the day of `Arafat. And if one does not get a Hadi and has not fasted (before the `Id) then one should fast of the days of Mina. (11, 12 and 13th of Dhul Hajja).
Reference: Sahih al-Bukhari 1999
In-book reference: Book 30, Hadith 104
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 31, Hadith 217