Musannaf Ibn Abi Shaybah

Hazrat Asma bint Abi Bakr narrates that she migrated towards the Noble Prophet (peace and blessings be upon him) while she was carrying Abdullah bin Zubair in her womb. Then, at the place of Quba, she gave birth to this child. So she nursed the newborn until she reached the Noble Prophet (peace and blessings be upon him), and then she brought him to the presence of the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) took him and placed him in his blessed lap. People began searching for dates so that they could perform tahneek for him. Thus, the very first thing that entered his stomach was the saliva of the Noble Prophet (peace and blessings be upon him). And the Prophet (peace and blessings be upon him) named him Abdullah.