It wasnarrated from Aswad that 'Aishah said:
"I never saw theMessengerof Allah (ﷺ) fasting the (first) ten days (of Dhul-Hijjah)." (ID)
English reference (ID): Vol. 1, Book 7, Hadith 1729 (ID)
Arabic reference (ID): Book 7, Hadith 1801 (ID)