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.

18. When asked by the rich young man the conditions of eternal life, to what did Jesus direct his attention?
22. After being united with Christ in the likeness of His death and resurrection, what should the believer do?
To what place was Christ taken?
How are those described who will he prepared for the coming of Christ?
What did Christ say of the certainty of this prophecy?
What is the condition of one who lacks these graces?
Who will be permitted to enter it?

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