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 did Christ say concerning the Book of Daniel?
What result is to be obtained by the exercise of the gifts in the church?
What marked the climax of Babylon's apostasy?
With what question did Christ meet their false ideas and reasoning regarding Sabbath-keeping?
What was the result of this message?
How long will they live?
What stands on either side of the river?

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