Sahih Bukhari, Chapter: Minor Pilgrimage (Umra)

I asked Anas how many times the Prophet had performed Umra. He replied, "Four times. 1. Umra of Hudaibiya in Dhi-l-Qaada when the pagans hindered him; 2. Umra in the following year in Dhi-l-Qaada after the peace treaty with them (the pagans); 3. Umra from Al-Jrrana 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. "