Volume 1, Book 2, Number 9:
Narrated 'Abdullah bin 'Amr:
The Prophet said, "A Muslim is the one who avoids harming Muslims with his tongue and hands. And a Muhajir (emigrant) is the one who gives up (abandons) all what Allah has forbidden."
The Hadith (الحديث, pl. Ahadith) is a body of laws, legends and stories about Muhammad's way of life, (Arabic, Sunnah which includes his biography or the sira) and the sayings themselves where he elaborated on his choices or offered advice; many parts of the Hadith deal with his companions (Sahaba).