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 language did Isaiah foretell Christ's birth?
What promise is thus fulfilled?
To what time were the prophecies of Daniel, as a whole, to be sealed?
What did the apostles say to the idolaters at Lystra?
What special reason did the Israelites have for keeping the Sabbath?
With what are we to comfort one another?
What positive declaration does the apostle then make?

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