"The observance of the Sabbath is no more a natural duty than circumcision" (Divine Legation, Book IV., sec. 6).
WILLIAM PENN.
"To call any day of the week a Christian Sabbath is not Christian, but Jewish" (Penn's Works).
CANON BARRY.
"The notion of a formal substitution, by apostolic authority, of the Lord's day for the Jewish Sabbath... has no basis whatever in holy scripture or in Christian antiquity" (Lecture on Sabbath).
REV. JAMES FREEMAN CLARKE.
"Scholars are now generally agreed that the Sabbath obligation was not transferred by Christ or his apostles to the first day; that there is not in the Christian scriptures [New Testament] a single command to keep the Sabbath in any form or on any day" (North American Review).
ANDREWS.
"The festival of Sunday is more ancient than the Christian religion, its origin being lost in remote antiquity. It did not originate, however, from any divine command nor from piety toward God; on the contrary, it was set apart as a sacred day by the heathen world in honor of their chief god, the sun" (History of the Sabbath, p. 258).
VERSTEGAN.