Sahih Bukhari
Laws of Inheritance (Al-Faraaid)
Volume: 008 / Book Number: 080 / Hadith Number: 717
Narrated Abu Huraira:
Allah's Apostle said, 'Beware of suspicion, for it is the worst of false tales and don't look for the other's faults and don't spy and don't hate each other, and don't desert (cut your relations with) one another O Allah's slaves, be brothers!" (See Hadith No. 90)