Doctrine and Covenants 71: 7-11
7 Wherefore, confound your enemies; call upon them to meet you both in public and in private; and inasmuch as ye are faithful their shame shall be made manifest.
8 Wherefore, let them bring forth their strong reasons against the Lord.
9 Verily, thus saith the Lord unto you—there is no weapon that is formed against you shall prosper;
10 And if any man lift his voice against you he shall be confounded in mine own due time.
11 Wherefore, keep my commandments; they are true and faithful. Even so. Amen.