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 encouraging statement follows concerning the supply of power to the faint?
To whom will the gates of the heavenly city finally be opened?
What did Babylon give to the nations to drink?
Where are the Ten Commandments recorded?
When Christ came to this earth, what was His attitude toward God's will, or law?
What will he one of the last great signs performed by this means, to fasten men in deception?
What is our duty toward the outcast and wandering?

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