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.

Why was He to be named Jesus?
What did Christ say of those who will to do God's will?
Before His birth, what did the angel say to Joseph concerning the naming of the child?
Did Christ know beforehand the treatment He was to receive?
Who made the Sabbath?
What will he the final result of the gospel?
How extensive will be the reign of Christ?

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