Contradiction with James 1:6-7
Numbers 32:31 speaks of assurance and commitment, whereas James emphasizes the instability of doubt, suggesting one should not expect to receive anything from the Lord.
James 1:6-7: But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.
Contradiction with Proverbs 3:5
Numbers 32:31 involves conditional trust and agreement, while Proverbs advises complete trust in the Lord without reliance on one's own understanding.
Proverbs 3:5: Trust in the LORD with all thine heart; and lean not unto thine own understanding.
Contradiction with Matthew 5:37
Numbers 32:31 details a specific agreement and commitment, while Matthew says to let your communication be simply 'yes' or 'no', anything more comes from evil.
Matthew 5:37: But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.