Sahih Muslim 2206
Sahih Muslim · Book 39: The Book of Greetings · For Every Disease There Is A Remedy, And It Is Recommended To Treat Disease
Jabir reported that Umm Salama sought permission from Allah's messenger (may Allah's peace upon him) tor getting herself cupped. The Apostle of Allah (ﷺ) asked Abu Taiba to cup her. He (Jabir) said:
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ ، حَدَّثَنَا لَيْثٌ ، ح وَحَدَّثَنَا مُحَمَّدُ بْنُ رُمْحٍ ، أَخْبَرَنَا اللَّيْثُ ، عَنْ أَبِي الزُّبَيْرِ ، عَنْ جَابِرٍ ، أَنَّ أُمَّ سَلَمَةَ، اسْتَأْذَنَتْ رَسُولَ اللَّهِ صلى الله عليه وسلم فِي الْحِجَامَةِ فَأَمَرَ النَّبِيُّ صلى الله عليه وسلم أَبَا طَيْبَةَ أَنْ يَحْجُمَهَا . قَالَ حَسِبْتُ أَنَّهُ قَالَ كَانَ أَخَاهَا مِنَ الرَّضَاعَةِ أَوْ غُلاَمًا لَمْ يَحْتَلِمْ .
I think he (Abu Taiba) was her faster brother or a young boy before entering upon the adolescent period.