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.

In what act especially has Gods love been manifest?
With what sins are rebellion and stubbornness classed?
What song of triumph follows the overthrow of Babylon?
What two covenants are contrasted in the Bible?
What does the Sabbath commandment require?
27. What wonderful promises are made to those who thus minister to the wants and distresses of others?
What peaceful condition will prevail in the earth made new?

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