From Sahih Bukhari (Hadith 1778):
Narrated Qatada:I asked Anas how many times the Prophet (ﷺ) had performed `Umra. He replied, "Four times. 1. `Umra of Hudaibiya in Dhil-Qa'da when the pagans hindered him; 2. `Umra in the following year in Dhil-Qa'da after the peace treaty with them (the pagans); 3. `Umra from Al-Ji'rana where he distributed the war booty." I think he meant the booty (of the battle) of Hunain. I asked, "How many times did he perform Hajj?" He (Anas) replied, "Once
Reference: Bukhari 1778