Sahih Al Bukhari Hadith Number 1996

Narrated Yahya: Hisham said, “My father said that ‘Aishah (ra) used to observe Saum (fast) on the days of Mina.” His (i.e., Hisham’s) father also used to observe Saum on those days.

30  Fasting
Hadith number 1996
Volume no 3
Chapter: 68 (Observing Saum (fast) on Tashriq days.)