1 Corinthians 14:16-17

16Otherwise when you are praising God in the Spirit, how can someone else, who is now put in the position of an inquirer, The Greek word for inquirer is a technical term for someone not fully initiated into a religion; also in verses 23 and 24. say “Amen” to your thanksgiving, since they do not know what you are saying?

17You are giving thanks well enough, but no one else is edified.