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 triumphant chorus will mark the end of the reign of sin?
To what does the blood of Christ witness?
6. Under the influence of her tender care and faithful instruction, what is said of the child life of Jesus?
10. Because the disciples plucked a few ears of corn on the Sabbath day to satisfy hunger, what accusation did the Pharisees make against them to Christ?
What was the object of the church bishops in securing these Sunday laws?
In what work are angels engaged?
Before he was afflicted, what did he do?

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