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.

13. What three general divisions did Jesus recognize as including all the writings of the Old Testament?
What was the special mission of John the Baptist?
What was indicated by the mixture of clay and iron in the feet and toes of the image?
What was in the ark, under the mercy-seat?
5. What description is given of the beast against whose worship this closing warning message is given?
With what announcement does the sixth trumpet close?
What was shown the Apostle John in vision?

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