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 other title is given this revelation of God to man?
What fate awaits blind teachers and their followers?
What is the beginning of wisdom?
10. Because the disciples plucked a few ears of corn on the Sabbath day to satisfy hunger, what accusation did the Pharisees make against them to Christ?
33. In view of the fact that we do not know the exact time of Christ's coming, what important admonition has He given us?
Against whom do the wicked go to make war, and what is the outcome?
What description is given of Gabriel in Daniel?

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