D&C 52

 As the Lord teaches provides a pattern that we may not be deceived, He teaches - 

"I will give unto you a pattern in all things, that ye may not be deceived; for Satan is abroad in the land, and he goeth forth deceiving the nations—

15 Wherefore he that prayeth, whose spirit is contrite, the same is accepted of me if he obey mine ordinances.

16 He that speaketh, whose spirit is contrite, whose language is meek and edifieth, the same is of God if he obey mine ordinances.

17 And again, he that trembleth under my power shall be made strong, and shall bring forth fruits of praise and wisdom, according to the revelations and truths which I have given you.

18 And again, he that is overcome and bringeth not forth fruits, even according to this pattern, is not of me.

19 Wherefore, by this pattern ye shall know the spirits in all cases under the whole heavens."  (Doctrine and Covenants 52:14–19)

One that specifically caught my attention was - 

"...if he obey mine ordinances."  (Doctrine and Covenants 52:16)