(3) باب كَمِ اعْتَمَرَ النَّبِيُّ صلى الله عليه وسلم
Narrated Qatada:
I asked Anas (about the Prophet's `Umra) and he replied, "The Prophet (ﷺ) performed `Umra when the pagans made him return, and Umra of al-Hudaibiya (the next year), and another `Umra in Dhi-l-Qa'da, and another `Umra in combination with his Hajj."
Reference: Sahih al-Bukhari 1779
In-book reference: Book 26, Hadith 7
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 27, Hadith 7