Minor Pilgrammage (Umra) 
Bukhari :: Book 3 :: Volume 27 :: Hadith 5
Narrated 'Ursa bin Az-Zubair:
I asked 'Aisha (whether the Prophet had performed 'Umra in Rajab). She replied, "Allah's Apostle never performed any 'Umra in Rajab."
Minor Pilgrammage (Umra)
Bukhari :: Book 3 :: Volume 27 :: Hadith 5
Narrated 'Ursa bin Az-Zubair:
I asked 'Aisha (whether the Prophet had performed 'Umra in Rajab). She replied, "Allah's Apostle never performed any 'Umra in Rajab."