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 promise is made to the obedient?
Why did the Lord destroy Sodom?
What was the character of- their deeds?
Until what time did the ceremonial law impose the service performed in the worldly sanctuary?
What test case arose in the time of the apostles over this question?
How was the faithfulness of this church commended?
How does the prophet again speak of this time?

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