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 does God's character preclude Him from doing?
How does Abraham's experience show that obedience and faith are inseparable?
I. What is said of the fifth commandment?
When was the little horn to arise?
While suffering in the garden of Gethsemane, how was Christ strengthened?
Why did Christ say the meek are blessed?
What will it mean to dwell in God's presence?

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