Contradiction with Proverbs 25:19
Trusting in an unfaithful person in time of trouble is compared to a broken tooth, while in 2 Samuel 15:20, reliance is placed on loyalty.
Proverbs 25:19: Confidence in an unfaithful man in time of trouble [is like] a broken tooth, and a foot out of joint.
Contradiction with Matthew 5:37
Encourages straightforward "Yes" or "No," while 2 Samuel 15:20 involves complex matters of loyalty and decision.
Matthew 5:37: But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.
Contradiction with Philippians 2:14
Advises to do everything without arguing or complaining, contrasting the uncertainty and emotional turmoil associated with the decision in 2 Samuel 15:20.
Philippians 2:14: Do all things without murmurings and disputings:
Contradiction with James 1:8
Describes a "double minded man" as unstable, implying indecision similar to the uncertainty expressed in 2 Samuel 15:20.
James 1:8: A double minded man [is] unstable in all his ways.