commandment

Short definition from Wiktionary

Noun

1. 1
   A divinely ordained command, especially one of the Ten Commandments.
2. 2
   Something that must be obeyed; a command or edict.
3. 3
   The offence of commanding or inducing another to violate the law.
4. 4
   The act of commanding; exercise of authority.
5. 5
   Any of the Ten Commandments.