Reference: Siyar A’laam an-Nubalaa – Volume 2, Page 496
On the authority of ‘Aa.ishah (radhi-yAllaahu ‘anhaa) who said:
The Prophet (sal-Allaahu ‘alayhi wa sallam) wanted to wipe the nasal mucus from [the young] Usaamah ibn Zayd, so I said to him: Leave me to do it. And he (sal-Allaahu ‘alayhi wa sallam) said:
«O ‘Aa.ishah, love him, for indeed I love him»
 adh-Dhahabee noted that both ‘Aa.ishah and Usaamah were of the same young age.