Minor Pilgrammage (Umra)
Bukhari :: Book 3 :: Volume 27 :: Hadith 7
I asked Anas (about the Prophet's 'Umra) and he replied, "The Prophet 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."
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