1 Corinthians 14:13

14:13 So then, one who speaks in a tongue should pray that he may interpret.

1 Corinthians 12:30

12:30 Not all have gifts of healing, do they? Not all speak in tongues, do they? Not all interpret, do they?

1 Corinthians 14:27

14:27 If someone speaks in a tongue, it should be two, or at the most three, one after the other, and someone must interpret.

sn The questions in vv. 29-30 all expect a negative response.