Hadith 14:70
Abu Bakr narrated to us, he said: Khalid ibn Makhlad narrated to us, from Ibn Mushir, from Hisham, from his father, from Asma bint Abi Bakr, that she brought Ibn al-Zubayr to the Prophet, may God bless him and grant him peace, when she gave birth to him. They requested a date, and he chewed it and rubbed it on his palate with it. So, the first thing that entered his stomach was the saliva of the Messenger of God, may God bless him and grant him peace.
حدثنا أبو بكر قال حدثنا خالد بن مخلد عن بن مسهر عن هشام عن أبيه عن أسماء بنت أبي بكر أنها أتت النبي صلى الله عليه وسلم بابن الزبير حين وضعته وطلبوا تمرة فحنكوه بها فكان أول شيء دخل بطنه ريق رسول الله صلى الله عليه وسلم