² For anyone who speaks in a tongue^[a](A) does not speak to people but to God. Indeed, no one understands them;^(B) they utter mysteries^(C) by the Spirit.

⁴ Anyone who speaks in a tongue^(A) edifies^(B) themselves, but the one who prophesies^(C) edifies the church.

¹³ For this reason the one who speaks in a tongue should pray that they may interpret what they say.^{(A) 14} For if I pray in a tongue, my spirit prays,^(B) but my mind is unfruitful. ¹⁵ So what shall I do? I will pray with my spirit,^(C) but I will also pray with my understanding; I will sing^(D) with my spirit, but I will also sing with my understanding.

²⁷ If anyone speaks in a tongue, two—or at the most three—should speak, one at a time, and someone must interpret. ²⁸ If there is no interpreter, the speaker should keep quiet in the church and speak to himself and to God.

⁴⁰ But everything should be done in a fitting and orderly^(A) way.