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.

To what are the wife and children of the man who fears the Lord likened?
9. What testimony did the Apostle Peter bear concerning his experience on the mount of transfiguration?
When did Sin and death enter the world?
What did the apostles say to the idolaters at Lystra?
Was the Sabbath designed to be a day for public worship?
What was one principal object in calling this council?
13. The righteous dead are raised at Christ's second coming. When will the rest of the dead, the wicked, be raised?

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