Sahih Bukhari

Narrated Abu Huraira:The Prophet (ﷺ) said, ""Avoid the seven great destructive sins."" They (the people!) asked, ""O Allah's Apostle! What are they?"" He said, ""To join partners in worship with Allah; to practice sorcery; to kill the life which Allah has forbidden except for a just cause (according to Islamic law); to eat up usury (Riba), to eat up the property of an orphan; to give one's back to the enemy and fleeing from the battle-field at the time of fighting and to accuse chaste women who never even think of anything touching chastity and are good believers