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.

In receiving the Son what do we have in Him?
What does he find who follows after righteousness?
What did Adam say as he received his wife from God?
What is one way in which a child may dishonor his parents?
How are the character, work, period of supremacy, and great power of the beast described?
Whom does God comfort?
What peaceful condition will prevail in the earth made new?

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