These were formerly sacrosanct tenets of the Dark Brotherhood. They have since been abandoned.
| I. | Never dishonor the Night Mother. To do so is to invoke the Wrath of Sithis. |
| II. | Never betray the Dark Brotherhood or its secrets. To do so is to invoke the Wrath of Sithis. |
| 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. |
| IV. | Never steal the possessions of a Dark Brother or Dark Sister. To do so is to invoke the Wrath of Sithis. |
| V. | Never kill a Dark Brother or Dark Sister. To do so is to invoke the Wrath of Sithis. |