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 assurance is given concerning the unfailing power of the Creator?
By what means did Herod seek to destroy Christ?
How did Christ's death on the cross affect the whole sacrificial system?
What requirement was made by these teachers from Judea concerning the ceremonial law?
What example did Christ set in Sabbath observance?
For what purpose did God give His Son to the world?
What did John the Baptist say to the Pharisees and Sadducees who came to his baptism?

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