The Five Tenets

They are:

.Tenet I. Never dishonor the Night Mother. To do so is to invoke the Wrath of Sithis.

.Tenet II. Never betray the Dark Brotherhood or its secrets. To do so is to invoke the Wrath of Sithis.

.Tenet III. Never disobey or refuse to carry out an order from a Dark Brotherhood superior. To do so is to invoke the Wrath of Sithis.

.Tenet IV. Never steal the possessions of a Dark Brother or Dark Sister. To do so is to invoke the Wrath of Sithis.

.Tenet V. Never kill a Dark Brother or Dark Sister. To do so is to invoke the Wrath of Sithis.