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 use of this prophecy by the Apostle Peter shows that it referred to Christ?
To whom did God commit the care and early training of His only begotten Son?
2. After being threatened with death if they did not make known the dream and the interpretation, what did the wise men say to the king?
How many are concerned in the judgment?
What day is the Sabbath, \"according to the commandment\"?
21. What did this council, in its twenty-ninth canon, decree concerning the Sabbath and Christians who continued to observe it ?
How are the people described who are developed by the threefold message here referred to?

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