27) remarks that the Ebionites observed both the Sabbath and the Lord's day; and this practice obtained to some extent in much wider circles, for the Apostolical Constitutions recommend that the Sabbath shall be kept as a memorial feast of the creation as well as the Lord's day as a memorial of the resurrection.
Some have claimed for it apostolical sanction and found its origin in the liturgical head-gear of the Jewish priesthood.
806-815, also article Didache.) Apostolical Constitutions.
Nicholson (Apostolical Succession in the Church of Sweden, 1880) seems to have proved so much from contemporary evidence.
Haddan, Apostolical Succession in the Church of England; F.