It wasnarrated that 'Aishah said:
"Asma' bint 'Umais gave birth atShajarah, and the Messenger of Allah (ﷺ) told Abu Bakr to tell herto take a bath and begin the Talbiyah." (ID)
English reference (ID): Vol. 4, Book 25, Hadith 2911 (ID)
Arabic reference (ID): Book 25, Hadith 3023 (ID)