1 Corinthians 14:10-14
14:10 There are probably many kinds of languages in the world, and none is without meaning.
14:11 If then I do not know the meaning of a language, I will be a foreigner to the speaker and the speaker a foreigner to me.
14:12 It is the same with you. Since you are eager for manifestations of the Spirit,
seek to abound in order to strengthen the church.
14:13 So then, one who speaks in a tongue should pray that he may interpret.
14:14 If I pray in a tongue, my spirit prays, but my mind is unproductive.