It was narrated from Jabir bin 'Abdullah, in the Hadith of Asma' bint 'Umair, when she gave birth in Dhul-Hulaifah, that the Messenger of Allah (ﷺ) said to Abu Bakr:"Tell her to perform Ghusl and enter Ihram
Hadith No. 214
Sunan an Nasai
Gradings:
Abu Ghuddah:
Sahih
Al-Albani:
Sahih