Where was the law of God written under the old covenant?

Answer

"And I made an ark of shittim-wood, and hewed two tables of stone. . . . And He wrote on the tables . . .
the Ten Commandments ' which the Lord spoke unto you in the mount out of the midst of the fire in the
day of the assembly: and the Lord gave them unto me." Deut. 10:3,4.

Why did Israel fail to attain unto righteousness?
Who was represented by \"the great horn,\" and what followed when it was broken?
What was contained in the second apartment?
How did Christ treat His Father's commandments?
For what purpose are we to remember the Sabbath day?
What will He say to those on the left?
What did the Ephesians do upon hearing the gospel?

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