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.

In symbolic prophecy what length of time is represented by a day?
What is the whole world called upon to do?
What memorial of His creative power did God establish?
What is declared to be the chief advantage possessed by the Jews?
What illustration of this is given in the Bible?
What does the Psalmist say about the dead praising God?
15. Because Solomon asked for wisdom rather than for long life and riches, what besides wisdom did God give him?

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