The Apostle Paul
Romans 15:6BSB·traditional attribution

so that with one mind and one voice you may glorify the God and Father of our Lord Jesus Christ.

Matthew Henry Presbyterian @wholebiblehenry

The apostle, having delivered two exhortations, before he proceeds to more, intermixes here a prayer for the success of what he had said. Faithful ministers water their preaching with their prayers, because, whoever sows the seed, it is God that gives the increase. We can but speak to the ear; it is God's prerogative to speak to the heart. Observe, I.

Commenting on Romans 15:5-6

John Gill Reformed Baptist @doctorgill

Wherefore receive ye one another,.... Into your hearts and affections; embrace one another cordially, the Jew the Gentile, the Gentile the Jew, the strong brother the weak, the weak the strong: as Christ also received us. The Alexandrian copy, the Vulgate Latin, Syriac, and Arabic versions, read "you". Both Jews and Gentiles, as appears from the following verses.

Albert Barnes Presbyterian @notesbybarnes

Verse 6. That ye may with one mind. The word here used is translated "with one accord," . It means unitedly, with one purpose, without contentions, and strifes, and jars. And one mouth. This refers, doubtless, to their prayers and praises. That they might join, without contention and unkind feeling, in the worship of God. Divisions, strife, and contention in the church prevent union in worship.