It is narrated from Sayyiduna Abu Qatadah bin Rib'i (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) used to pray while he (peace and blessings be upon him) was carrying Umamah, the daughter of Zaynab, the daughter of the Messenger of Allah (peace and blessings be upon him), who was the daughter of Abu al-As bin al-Rabi'. When he bowed, he would put her down, and when he stood, he would pick her up again, until he completed the prayer.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19281