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.

15. When God sent the Ninevites a warning message, how did they show their repentance, and what was the result?
What did the prophet say Christ would be called to endure?
After creating Adam and Eve, what did God say to them?
What similar charge was brought against the Apostle Paul?
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?
What may be said of \"the sea and the waves roaring\"?
12. What class of God's servants have evil angels, through wicked men, seemed to make special objects of attack?

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