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.

After man had sinned, how did God show His love, and His willingness to forgive?
In what event was this prophecy fulfilled?
With what words do the Scriptures conclude the record of Christ's early life?
What did He teach concerning the stability of the law?
When we see all these things, what are we to know?
Where do all go at death?
Amidst poverty, suffering, and distress, what kind of workers does God wish to see?

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