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 extent has God magnified His Word?
Through whom will Abraham receive the promise of the future inheritance?
What change is wrought in conversion, or the new birth?
7. Near the close of the three and one-half years drought in Israel, brought about as a judgment did King Ahab bring against Elijah?
What is Christ's message to the last church?
What is said of the strength and character of the angels?
What will he receive who endures temptation?

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