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 the prophet say Christ would be called to endure?
How did Christ show His tender regard for children?
When the he goat \"was strong,\" what occurred?
Who did He say would be called great in the kingdom?
When the trees put forth their leaves, what do we know?
What shows that the actions of men are recorded?
Why was the parable of the importunate widow given?

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