It was narrated that 'Aishah said:
"Usamah stumbled at the threshold of the door and cut his face. The Messenger of Allah said: 'Remove the harm (the blood) from him,' but I was repulsed by that. He started to suck the blood and remove it from his face, then he said: 'If Usamah were a girl, I would have adorned him and dressed him until I married him off."'
English reference: Vol. 3, Book 9, Hadith 1976
Arabic reference: Book 9, Hadith 2052