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.

What question did -Christ's wonderful teaching call forth?
11. How did the Jewish leaders in the days of Christ, for the sake of gain, make void the fifth commandment?
What interpretation is given to this little horn?
What did Jesus say of His attitude toward the law?
In what words had the prophet Daniel foretold this?
16. After the sealing work brought to view in Revelation 7, which takes place under the sixth seal, how is the seventh seal introduced?
What peaceful condition will reign throughout the earth then?

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