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 prophecy was fulfilled in the slaughter of the children of Bethlehem?
What concrete example makes clear the meaning of this doctrine?
What did Pilate propose to do when Christ was again brought before him?
What will He then do for each one?
How did Christ answer him?
What becomes of the living wicked when Christ comes?
In his dream at Bethel, what did Jacob see?

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