Narrated Abu Qatada Al-Ansari:

Allah's Apostle (peace and blessings of Allah swt be upon him)  was praying and he was carrying Umama the daughters of Zainab, the daughter of Allah's Apostle (peace and blessings of Allah swt be upon him) and she was the daughter of 'As bin Rabi'a bin 'AbduShams. When he (the prophet) prostrated, he put her down and when he stood, he carried her (on his neck).

Bukhari :: Book 1 :: Volume 9 :: Hadith 495