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.

When believers are baptized into Christ, whom do they put on?
What did Moses set forth as the basis of righteousness?
What reference is made in the Psalms to Christ's use of parables?
19. What message did Christ send to John the Baptist while John was in prison, to strengthen his wavering faith?
Because of the interest which this miracle created in Him, what did the Pharisees say?
In what words does Christ recognize marriage as of God?
What did the goat with the notable horn represent?

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