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.

At what cost did even He learn the lesson of obedience?
5. After the healing of the blind man, upon what charge did some of the Pharisees seek to prove that Christ was not of God?
What announcement immediately follows the judgment-hour message of Rev. 14: 6,7?
When asked which commandments, what did Jesus say?
What is the first which He took away?
In what words did He foretell its destruction?
Why did Christ say the meek are blessed?

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