Martin Luther, Henry Bell (Captain.), Joseph KERBY, Anton Lauterbach (1818). “The Familiar Discourses of Dr. Martin Luther ... Translated ... by Captain Henry Bell ... A New Edition, Revised ... by J. Kerby, Etc”, p.238
Charles Haddon Spurgeon (1988). “Spurgeon at His Best: Over 2200 Striking Quotations from the World's Most Exhaustive and Widely-read Sermon Series”, Baker Publishing Group