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.

To what extent has God magnified His Word?
How came Jesus to live for a time in Egypt?
What were these gifts that Christ gave to men?
10. What does the Psalmist say was the reason why God brought His people out of Egypt, and placed them in Canaan?
Why, under these plagues, does the Lord give men blood to drink?
How does God regard sorcerers?
Why was the parable of the importunate widow given?

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