6 Now, brothers,¹ if I come to you speaking in tongues, how will I benefit you unless I bring you some ^yrevelation or knowledge or prophecy or ^zteaching?

9 So with yourselves, if with your tongue you utter speech that is not intelligible, how will anyone know what is said? For you will be ^bspeaking into the air.

11 but if I do not know the meaning of the language, I will be ^ca foreigner to the speaker and the speaker a foreigner to me. 12 So with yourselves, since you are eager for manifestations of the Spirit, strive to excel in building up the church.

24 But if all prophesy, and an unbeliever or outsider enters, he is convicted by all, he is called to account by all,

27 If any speak in ^sa tongue, let there be only two or at most three, and each in turn, and let someone interpret. 28 But if there is no one to interpret, let each of them keep silent in church and speak to himself and to God.