Why did God make His promise to the seed of Abraham?

Answer

"Because that Abraham obeyed My voice, and kept My charge, My commandments, My statutes, and My
laws." Gen. 26: 5.
NOTE - Then God's commandments and laws existed in the time of Abraham.

For what is all Scripture profitable?
By what is the knowledge of sin?
What kind of labor is to be done through the week?
By what authority was Sunday Sabbath-keeping instituted?
What song will they sing?
What takes place at the sounding of the trumpet?
With what should our prayers be mingled?

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