How early was this sacrificial system known?

Answer

"By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he
was righteous, God testifying of his gifts." Heb. 11: 4. See Gen. 4: 3-5; 8: 20.

What prophecy foretold Christ's triumph over death?
What became of the various parts of the image?
What final call to come out of Babylon is to go forth?
And what is indicated as the lawful use of the law?
What did Jesus say of His attitude toward the law?
Was the Sabbath intended as a day for public worship?
What command was given these locusts?

Questions & Answers are from the book Bible Readings for the Home Circle