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 encouraging statement follows concerning the supply of power to the faint?
In order to baptize the eunuch, where did Philip take him?
What blessed assurance is given all believers in Christ?
How is the church of the last days described?
What system was established on account of man's transgression of the law of God?
What is the condition of one who lacks these graces?
Does God willingly afflict the children of men?

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