1 Corinthians 14:13
Verse 13 of 40. The 14th of 16 chapters in 1 Corinthians, in The Letters of Paul.
9So also you, unless you uttered by the tongue words easy to understand, how would it be known what is spoken? For you would be speaking into the air.
10There are, it may be, so many kinds of languages in the world, and none of them is without meaning.
11If then I don’t know the meaning of the language, I would be to him who speaks a foreigner, and he who speaks would be a foreigner to me.
12So also you, since you are zealous for spiritual gifts, seek that you may abound to the building up of the assembly.
13Therefore let him who speaks in another language pray that he may interpret.
14For if I pray in another language, my spirit prays, but my understanding is unfruitful.
15What should I do? I will pray with the spirit, and I will pray with the understanding also. I will sing with the spirit, and I will sing with the understanding also.
16Otherwise, if you bless with the spirit, how will he who fills the place of the unlearned say the “Amen” at your giving of thanks, seeing he doesn’t know what you say?
17For you most certainly give thanks well, but the other person is not built up.
World English Bible. Public domain. Set as prose throughout, including the poetry, because the text is published to us without its lines.