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 takes place when one is converted to Christ?
What inspired Prayer sets the standard of Christian experience?
For how long a time should one honor his parents?
On what did God write the Ten Commandments?
18. What does the prophet say the two -horned -beast power will attempt to enforce upon all the people?
By what title does the Psalmist address God?
Who are heirs of the promise?

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