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.

How closely are righteousness and life thus united?
What promise is made to the obedient?
Did Jesus ever make use of ordinary means in performing His miracles?
How did Christ show His tender regard for children?
What example did Christ set in Sabbath observance?
When are the saints to be like Jesus?
22. While many will be deceived by these wonders, and accept of the false christs that appear, what will those say who have maintained their love for the truth, and patiently waited for Christ's return?

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