It is narrated from Sayyidah Asma' bint Umays (may Allah be pleased with her) that she gave birth to Muhammad bin Abi Bakr at al-Bayda'. Abu Bakr (may Allah be pleased with him) mentioned this to the Messenger of Allah (peace and blessings be upon him), and he (peace and blessings be upon him) said: "Tell her to take a ritual bath (ghusl) and then enter ihram."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20737
It is narrated from Sayyidah Asma' bint Umays (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) said to her: "O daughter of Umays! Ghusl, Jumu'ah, shaving the head and cutting the hair are not obligatory upon you women, except that when one of you performs Hajj, on the Day of Sacrifice she herself, or one of her mahram relatives, should take a little from the ends of the hair at the front of her head."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20738
It is narrated from Sayyidah Asma' bint Umays (may Allah be pleased with her) that she gave birth to a child at Dhu al-Hulayfah, and the Prophet (peace and blessings be upon him) ordered her to take a ritual bath and enter ihram.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20739