1 Corinthians 14:13-19

13Wherefore let him that speaks with a tongue pray that he may interpret.

14For if I pray with a tongue, my spirit prays, but my understanding is unfruitful.

15What is it then? I will pray with the spirit, but I will pray also with the understanding; I will sing with the spirit, but I will sing also with the understanding.

16Since otherwise, if thou blessest with [the] spirit, how shall he who fills the place of the simple [Christian] say Amen, at thy giving of thanks, since he does not know what thou sayest?

17For thou indeed givest thanks well, but the other is not edified.

18I thank 1God I speak in a tongue more than all of you:

19but in [the] assembly I desire to speak five words with my understanding, that I may instruct others also, [rather] than ten thousand words in a tongue.