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 in the early church showed living faith?
What are fitting inquiries for those convicted of sin?
What reply did the Lord immediately make?
Who minister to God, and assist in the judgment?
How is sin defined?
In what similar language is the fate of the fourth beast of Daniel 7 described?
What name is given to the second state of the church?

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