Contradiction with Matthew 10:16
2 Samuel 15:36 suggests a shrewd plan, while Matthew 10:16 advises to be "harmless as doves."
Matthew 10:16: Behold, I send you forth as sheep in the midst of wolves: be ye therefore wise as serpents, and harmless as doves. [harmless: or, simple]
Contradiction with Proverbs 11:13
2 Samuel 15:36 involves sharing secrets, whereas Proverbs 11:13 warns against revealing secrets.
Proverbs 11:13: A talebearer revealeth secrets: but he that is of a faithful spirit concealeth the matter. [A talebearer: Heb. He that walketh, being a talebearer]
Contradiction with Exodus 20:16
2 Samuel 15:36 involves potential deceit, while Exodus 20:16 commands not to bear false witness.
Exodus 20:16: Thou shalt not bear false witness against thy neighbour.
Contradiction with Colossians 3:9
2 Samuel 15:36 involves strategic information sharing, which may involve deceit, whereas Colossians 3:9 says not to lie to one another.
Colossians 3:9: Lie not one to another, seeing that ye have put off the old man with his deeds;
Contradiction with James 5:12
2 Samuel 15:36 could involve deceit, while James 5:12 advises to let your "yes" be yes and "no" be no, avoiding deceitful actions.
James 5:12: But above all things, my brethren, swear not, neither by heaven, neither by the earth, neither by any other oath: but let your yea be yea; and [your] nay, nay; lest ye fall into condemnation.