Roman Catholic Confessions Cardinal Gibbons, The Faith of our Fathers, 88th ed., pp. 89.

Roman Catholic Confessions https://www.sabbath.org/index.cfm/fuseaction/Library.sr/CT/OTHER/k/843/roman-catholic-protestant-confessions-about-sunday.htm James Cardinal Gibbons, The Faith of our Fathers, 88th ed., pp. 89. "But you may read the Bible from Genesis to Revelation, and you will not find a single line authorizing the sanctification of Sunday. The Scriptures enforce the religious observance of Saturday, a day which we never sanctify."