"I will multiply your descendants as the stars of heaven, and will give your descendants all these lands; and by your descendants all the nations of the earth shall be blessed; because Abraham obeyed Me and kept My charge, My commandments, My statutes and My laws" (Genesis 26:4).
Federal Visionists love to use this verse to show that it is possible for us to keep the law. This is modern-day Pelagianism.
The commandments, statues, and laws of God require absolute perfection. Only Jesus could keep these perfectly. Thus, this passage must be referring to the glorious truth that Christ kept the law for Abraham.