Parallel
1 Corinthians 14:16
Clementine Vulgate · Berean Standard Bible
Ceterum si benedixeris spiritu, qui supplet locum idiotæ, quomodo dicet : Amen, super tuam benedictionem ? quoniam quid dicas, nescit.
Otherwise, if you speak a blessing in spirit (note: Or in the Spirit), how can someone who is uninstructed say “Amen” to your thanksgiving, since he does not know what you are saying?