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.

Where was Christ to be born?
What is said of the poor but wise child?
How are the character, work, period of supremacy, and great power of the beast described?
What was the object of the church bishops in securing these Sunday laws?
What protection has God promised His people during the seven last plagues?
What encouragement does Jesus give us to meet cheerfully the troubles and trials of life?
What special blessings were conferred on the Israelites?

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