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.

When Christ ascended, what did He give to men?
With what words did He justify acts of mercy on the Sabbath day?
How enduring did He say the law is?
11. Where did the apostle see this same company a little later, and what did they have in their foreheads?
How universal is the worship of this power to become?
What influence has this hope upon the life?
How may grace and peace be multiplied in believers?

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