1 Corinthians 14:22
"Wherefore tongues are for a sign, not to them that believe, but to them that believe not: but prophesying serveth not for them that believe not, but for them which believe."
Cross References (ranked by relevance)
Mark 16:17
And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues;
1 Corinthians 14:1
Follow after charity, and desire spiritual gifts, but rather that ye may prophesy.
1 Timothy 1:9
Knowing this, that the law is not made for a righteous man, but for the lawless and disobedient, for the ungodly and for sinners, for unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,