Sahih Muslim | Book 25 | Hadith Number 5344

Narrated by 'Urwa b. Zubair and Fatima daughter of Mandhir b. Zubair,
'Urwa b. Zubair and Fatima daughter of Mandhir b. Zubair, reported that Asma' daughter of Abu Bakr was at the time of migration in the family way with 'Abdullah b. Zubair (in her womb). She came to Quba' and gave birth to 'Abdullah at that place and then sent him to Allah's Messenger (may peace be upon him) so that he should rub his palate with chewed dates. Allah's Messenger (may peace he upon him) took hold of him (the child) and he placed him in his lap and then called for dates. 'Aisha said: Some time was spent before we were able to find them. He (the Holy Prophet) chewed them and then put his saliva in his mouth. The first thing that entered his stomach, was the saliva of Allah's Messenger (may peace be upon him). Asma' said: He then rubbed him and blessed him and gave him the name of Abdullah. He ('Abdullah) went to him (the Holy Prophet) when he had attained the age of seven or eight years in order to pledge allegiance to Allah's Messenger (may peace be upon him) as Zubair had commanded him to do. Allah's Messenger (may peace be upon him) smiled when he saw him coming towards him and then accepted his allegiance.