From Sahih Bukhari (Hadith 1709):
Narrated `Amra bint `Abdur-Rahman:I heard `Aisha saying, "Five days before the end of Dhul-Qa'da we set out from Medina in the company of Allah's Messenger (ﷺ) with the intention of performing Hajj only. When we approached Mecca, Allah's Messenger (ﷺ) ordered those who had no Hadi with them to finish their Ihram after performing Tawaf of the Ka`ba and (Sa`i) between Safa and Marwa." `Aisha added, "On the day of Nahr (slaughtering of sacrifice) beef was brought to us. I asked, 'What is this?' The reply was, 'Allah's Apostle (ﷺ) has slaughtered (sacrifices) on behalf of his wives
Reference: Bukhari 1709