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.

How necessary is faith?
In what promise was a Saviour from sin first revealed?
After He had prayed this remarkable prayer three times, what occurred?
2. What did God tell Adam and Eve would he the result if they transgressed, and partook of the forbidden fruit?
In His first recorded discourse, what did Christ say of the law?
What is Peter's testimony regarding it?
What did it lead Moses to do?

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