Muhammad bin Fadayl bin Ghazwan محمد بن فضيل بن غزوان · The Chapters on Marriage

"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."'