1Corinthians 14:5 for example.
I would that ye all speak with tongues, but rather that ye prophesied; for gre4ater is he that prophesieth than he that speaketh with tongues, except he interpret, that the church may receive edifying.
Wasn't it Judaic custom to read from the holy script? Was everyone able to understand? Not hardly. But the meturgeman interpreted the tongue so that the unlearned could receive edification.