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?
Whom did Christ say the Holy Spirit would glorify?
Because evil is not punished immediately, what presumptuous course do many pursue?
When did the moon refuse to give her light?
What did Paul say regarding our duty to the poor?
What delights and pleasures await the child of God?
In tempting Christ, what ownership did Satan claim?

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