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 the beginning of His ministry, what example did Jesus set for the benefit of His followers?
What lesson did Christ design to teach in healing the man sick of the palsy?
How was Joseph regarded by his father?
Through whom did God create the world?
How does Paul give expression to this hope?
How is the closing period of tribulation of the church during this time referred to?
What seasons of worship will be observed in the new earth?

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