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.

Of whom was Christ to be born?
How did Jesus honor His parents?
What will occur when the Lord descends from heaven?
What power is there in the blood of this covenant?
21. What scripture shows that Satan is to work with special power and deceptive wonders just before Christ's second coming?
Is this chastening a pleasant experience?
Is it our duty always to give what is expected or asked?

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