Fighting for the Cause of Allah (Jihaad)
Bukhari :: Book 4 :: Volume 52 :: Hadith 313
Narrated 'Ata':
I and 'Ubai bin 'Umar went to 'Aisha while she was staying near Thabir (i.e. a mountain). She said, "There is no Migration after Allah gave His Prophet victory over Mecca."