The expression so rendered in the Authorized English Version occurs only once in the New Testament, viz. in , and is there unaccompanied by any other words tending to explain its meaning. It is, however, well known that the same phrase was, in after ages of the Christian church, used to signify the first day of the week, on which the resurrection of Christ was commemorated. Hence it has been inferred that the same name was given to that day during the time of the Apostles, and was in the present instance used by St. John in this sense, as referring to an institution well known, and therefore requiring no explanation [see article SABBATH].