1CO 14:16

16 Suppose that any one of you praises God (OR, thanks God for what he has done), using only your [(sg)] spirit [and not using your mind]. Maybe some people [will be present who] do not know about [the abilities that God’s Spirit gives to believers]. Because they do not know what you are saying, after you thank God, they will not [RHQ] know when to say “Amen!/I agree!”