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.

With whom was Christ crucified?
What is said of those who read, hear, and keep the things contained in this book?
What provision has been made so that we may keep God's law?
How, then, did the Lord prove the people (verse 4) whether they would keep His law, or not?
Following the signs of His coming, what did Christ say would take place?
What are we admonished not to do?
12. What class of God's servants have evil angels, through wicked men, seemed to make special objects of attack?

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