Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)

Bukhari :: Book 5 :: Volume 59 :: Hadith 563

Narrated 'Amir:

Whenever Ibn 'Umar greeted the son of Ja'far, he used to say (to him), "Assalam 'Alaika (i.e. peace be on you) O the son of two-winged person."