Contradiction with Proverbs 3:5
Trusting in the Lord requires not leaning on one's understanding, which contrasts with strict adherence to commands for understanding as in Deuteronomy 15:5.
Proverbs 3:5: Trust in the LORD with all thine heart; and lean not unto thine own understanding.
Contradiction with Galatians 2:16
Justification is by faith in Christ, not by following the law, showing a contradiction to the emphasis on law-keeping in Deuteronomy 15:5.
Galatians 2:16: Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.
Contradiction with Romans 6:14
Believers are under grace, not law, which contradicts the implication that blessings come from following the law in Deuteronomy 15:5.
Romans 6:14: For sin shall not have dominion over you: for ye are not under the law, but under grace.
Contradiction with Acts 15:10-11
The apostles argue against placing the yoke of the law on believers, conflicting with the requirement to hearken to the law in Deuteronomy 15:5.
Acts 15:10-11: Now therefore why tempt ye God, to put a yoke upon the neck of the disciples, which neither our fathers nor we were able to bear?
Contradiction with Hebrews 8:13
Declares the old covenant obsolete, conflicting with the emphasis on command observance found in Deuteronomy 15:5.
Hebrews 8:13: In that he saith, A new [covenant], he hath made the first old. Now that which decayeth and waxeth old [is] ready to vanish away.