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 are we exhorted by, the prophet to seek?
How are those described who accept this message?
What testimony did the chief priests and Pharisees bear concerning Christ's work?
What assurance was given to Daniel concerning the period of time mentioned in verse 14?
What is the character of God, and how only can He be truly worshipped?
Under what striking symbol was all this foretold?
What is the result of cultivating these eight graces?

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