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 is the ultimate purpose of faith?
In whose name should everything be done?
How did Christ show His tender regard for children?
Was the judgment still future in Paul's day?
When Christ came to this earth, what was His attitude toward God's will, or law?
What are all admonished to do when these signs have appeared?
What protection has God promised His people during the seven last plagues?

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