"If a man commits something to your care, be sure to return it to him. Never betray anyone's trust, not even if the person concerned has failed to stand by his commitments to you."HADITH OF AT-TIRMIDHI
On the Authority of Abu Hurayrah
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).