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 what language did Isaiah foretell Christ's birth?
What would make the death of Christ in vain?
In thus reconciling the world unto Himself, what attitude did God take toward men?
By what is the Medo-Persian Empire represented in the great image?
In view of the judgment hour, what is proclaimed anew?
How is the law fulfilled?
What is one reason why the last days were to be perilous?

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