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.

Whom did Moses say the Lord would raise up?
What is the basis of faith?
What takes place when one is converted to Christ?
26. What event is directly connected with the blotting out of sin and the final refreshing from God's presence?
8. By what command did the king repudiate the religion taught in Babylon by Daniel and others who feared God?
Did Christ have anything to do with creation and the making of the Sabbath?
What encouragement is held out concerning the branches which have been broken off?

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