What is the Book of 2 Peter All About?
Why Should Christians "Wait for the Hope of Righteousness" (Galatians 5:5)?
How Should We Interpret "I Give You a Hope and a Future" (Jeremiah 29:11)?
Orr, James, M.A., D.D. General Editor. "Entry for 'SULPHUR'". "International Standard Bible Encyclopedia". 1915.