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 miracle did Christ bring to a climax His works on earth?
What was the fourth beast declared to be?
How many lawgivers are there?
Until what time did the ceremonial law impose the service performed in the worldly sanctuary?
When had God said this?
What else did Jesus do on the Sabbath?
12. Why did Job wish that his words were written in a book, graven with an iron pen and lead in the rock forever?

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