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.

Where was the Messiah to he born?
Why did God reprove Eli?
How many must meet the test of the judgment?
In what similar language is the fate of the fourth beast of Daniel 7 described?
What did Christ tell the rich young man to do?
How did Christ speak of the gathering of the Gentiles?
In what respect is the reaping of God's people to differ from their sowing?

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