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.

In what words does Daniel foretell Christ's receiving His kingdom?
In what other way do some dishonor their father and mother?
What will result if correction is withheld?
How earnestly should parents teach their children the things of God?
When Moses came down from Sinai, what did he see?
What was the song of Moses?
What scripture indicates that each child of God has an accompanying angel?

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