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.

When did he say he saw the majesty of Christ, and heard the voice from heaven?
9. In what statement to the woman at Jacob's well did Jesus intimate that the ceremonial system of worship would be abolished?
How is the conflict between Christ and Satan described?
What will the world be doing when Christ comes?
What scene in heaven was presented to the prophet as the seventh trumpet was about to sound?
What is implied in a knowledge of God and Jesus Christ?
Does He afflict to leave the one chastened in despair?

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