Matthew Poole and continuators on Revelation 1:10

10 I was in the Spirit on the Lords day , and heard behind me a great voice, as of a trumpet ,

Not only in spiritual imployment, suppose Meditation, and Prayer, but in an Extasie; my Soul was (as it were) separated from my Body, and under the more than ordinary Influence and Communications of the Spirit, as Acts 10.10. and 11.5. ad 16.9. and 18.9.

Upon the Christian Sabbath, called the Lord's Day, (as the Eucharist, or breaking of Bread, is called the Lord's Suppers, 1 Cor. 11.20.) because Christ instituted it; or, because the end of its Institution was the Remembrance of Christ's Resurrection, (as the end of the Lord's Supper was the Commemoration of Christ's Death) or because it was instituted for the Honour of Christ.

Iohn in the Isle of Patmos was keeping the Christian Sabbath in Spiritual Services, Meditation and Prayer▪ and fell into a Trance, wherein he had a more immediate Communion with the Holy Spirit, which begun with his hearing a loud Voice, as it were, behind him, as loud as the sound of a Trumpet.

Marginal references: Chap. 4.2.