D&C 43

 As the Lord teaches the doctrine of councils, He gives instructions - 

"...behold, I give unto you a commandment, that when ye are assembled together ye shall instruct and edify each other, that ye may know how to act and direct my church, how to act upon the points of my law and commandments, which I have given.

9 And thus ye shall become instructed in the law of my church, and be sanctified by that which ye have received, and ye shall bind yourselves to act in all holiness before me—

10 That inasmuch as ye do this, glory shall be added to the kingdom which ye have received. Inasmuch as ye do it not, it shall be taken, even that which ye have received.

11 Purge ye out the iniquity which is among you; sanctify yourselves before me..."  (Doctrine and Covenants 43:8–11)