Asma daughther of 'Umais gave birth to Muhammad bin Abi Bakr at Shajarah. The Messenger of Allah ﷺ commanded Abu Bakr to ask her to take a bath and wear ihram. (Using translation from Abū Dāʾūd 1743)
نُفِسَتْ أَسْمَاءُ بِمُحَمَّدِ بْنِ أَبِي بَكْرٍ بِالشَّجَرَةِ «فَأَمَرَ رَسُولُ اللَّهِ ﷺ أَبَا بَكْرٍ أَنْ تَغْتَسِلَ وَتُهِلَّ»