Jamieson, Fausset & Brown, on 1Cor 14:28

“But if there be no interpreter, let him hold his peace in the church, and speak to himself and to God.”

“let him--the speaker in unknown tongues. speak to himself, and to God--(compare Co1 14:2, Co1 14:4) --privately and not in the hearing of others.”

Imported from an open dataset — not yet checked against the printed edition.