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 are the wages of sin?
What high ideal should he placed before the young?
What did the Apostle Paul say the \"man of sin\" would do?
Was there anything made without Christ?
In his dream at Bethel, what did Jacob see?
22. How did He manifest His sympathy in the case of Mary and her friends weeping over the death of Lazarus?
What has this firm trust in Jesus led many to do?

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