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?
What did Christ say of those who will to do God's will?
Through what was Christ made a complete and perfect Saviour?
In what spirit should children obey their parents?
With what promise do the Old Testament Scriptures close?
Are angels of a higher order of beings than man?
How does God regard the afflicted?

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