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.

Through whom did God create all things?
What were some of the results of the preaching of the gospel under the outpouring of the Spirit?
What did Jesus say of the sacramental wine?
When Christ thus ministers the law in the heart, what does it become?
What did God purpose to do with the people of that day?
How was the faithfulness of this church commended?
What will the righteous do upon rising from the grave?

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