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 did he tell them to do?
What did ancient Babylon do to all the nations?
7. Because Jesus healed a man on the Sabbath day, and told him to take up his bed and walk, what did the Jews do?
What change will then take place in both the living and the sleeping saints?
Whose prayers does Solomon say are an abomination?
To what place did Jesus retire for secret devotion?
What will be excluded from this city?

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