Sahih Muslim
The Book on Salutations and Greetings (Kitab As-Salam)
Book Number: 026 / Hadith Number: 5469
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 (may peace be upon him) asked Abu Taiba to cup her. He (Jabir) said: I think he (Abu Taiba) was her faster brother or a young boy before entering upon the adolescent period.