1 John 4:1

1BelovedἈγαπητοί,notμὴeveryπαντὶspiritπνεύματιbelieveπιστεύετε,butἀλλὰtestδοκιμάζετεtheτὰspiritsπνεύματαwhetherεἰofἐκτοῦGodθεοῦthey areἐστιν,becauseὅτιmanyπολλοὶfalse prophetsψευδοπροφῆταιhave gone outἐξεληλύθασινintoεἰςtheτὸνworldκόσμον.

Beloved, do not believe every spirit, but test the spirits, whether they are of God, because many false prophets have gone out into the world.