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 did Moses set forth as the basis of righteousness?
What must be crucified and eliminated from our lives if we would be holy?
What is revealed in God's law?
7. Because Jesus healed a man on the Sabbath day, and told him to take up his bed and walk, what did the Jews do?
How are the character, work, period of supremacy, and great power of the beast described?
Upon whom was the name Israel first bestowed?
What therefore follows?

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