Contradiction with Matthew 7:7
Isaiah 16:12 mentions Moab's prayers going unanswered, while Matthew 7:7 emphasizes that asking leads to receiving.
Matthew 7:7: Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you:
Contradiction with John 14:13
Isaiah 16:12 shows prayer without result, whereas John 14:13 assures that prayers in Jesus' name will be answered.
John 14:13: And whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son.
Contradiction with James 5:16
Isaiah 16:12 depicts ineffectiveness in Moab's prayer, yet James 5:16 claims the prayer of a righteous person is powerful.
James 5:16: Confess [your] faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.
Contradiction with 1 John 5:14
Isaiah 16:12 suggests prayers are ineffective, while 1 John 5:14 states that prayers in accordance with God's will are heard.
1 John 5:14: And this is the confidence that we have in him, that, if we ask any thing according to his will, he heareth us: [in: or, concerning]