21 And if you say in your heart, How shall we know the word which the LORD has not spoken?
Deuteronomy 18:21 Cross References - AKJV
1 Thessalonians 5:24
24 Faithful is he that calls you, who also will do it.
1 John 4:1-3
1 Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
2 Hereby know you the Spirit of God: Every spirit that confesses that Jesus Christ is come in the flesh is of God:
3 And every spirit that confesses not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof you have heard that it should come; and even now already is it in the world.
Revelation 2:2
2 I know your works, and your labor, and your patience, and how you can not bear them which are evil: and you have tried them which say they are apostles, and are not, and have found them liars: