1 Corinthians 14:23

If therefore the whole church be come together into one place ἐπὶ τὸ αὐτό. The usual word for the place of assembly, as in ch. 1 Corinthians 11:20; Acts 2:1. However well calculated the gift of tongues might be to arrest and compel attention when used properly, it is clear, says the Apostle, that its introduction at the public assemblies of the Church was not a proper use of it, unless (1 Corinthians 14:27) it were restricted in its use by wise rules. It not so restricted, so far from its being a sign to unbelievers, it would give them, as well as the great body of the Christian laity, occasion of complaint, and even ridicule.

all Not necessarily all together, as some have supposed, but that no other means of communication was adopted by any butthe unknown tongue. Meyer.