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.

Whom did Jesus pronounce blessed?
What was predicted of Christ's preaching?
In what other way is this same truth stated?
17. After having made atonement for the people in the most holy place, what did the high priest next do?
By what is the knowledge of sin?
When was there a remarkable display of falling stars?
17. Under what figure are the Gentile believers represented who have become a part of the true Israel of God?

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