Cross reference
1 Corinthians 14:29
29 And let the prophets give their words, but not more than two or three, and let the others be judges of what they say.
1 Corinthians 12:10
10 And to another the power of working wonders; and to another the prophet's word; and to another the power of testing spirits; to another different sorts of tongues; and to another the power of making clear the sense of the tongues:
1 Thessalonians 5:19-21
19 Do not put out the light of the Spirit;
20 Do not make little of the words of the prophets;
21 Let all things be tested; keep to what is good;
1 John 4:1-3
1 My loved ones, do not put your faith in every spirit, but put them to the test, to see if they are from God: because a great number of false prophets have gone out into the world.
2 By this you may have knowledge of the Spirit of God: every spirit which says that Jesus Christ has come in the flesh is of God:
3 And every spirit which does not say this is not from God: this is the spirit of Antichrist, of which you have had word; and it is in the world even now.
1 Corinthians 14:39
39 So then, my brothers, let it be your chief desire to be prophets; but let no one be stopped from using tongues.