The Treatise on Rights by Imam Zain al Abidin (A.S) Rights of Allah -7

7. Rights of Hand

"The right of your hand is that you stretch it not toward that which is unlawful to you." 

The Ima`m, peace be on him, mentioned the right of hand against man; its right is that he should not stretch it toward what Allah has made unlawful such as stealing men's possessions, aggression against them, and helping a wrong-doer, hence he is worthy of punishment in the next world and men's blame in this world.