Contradiction with Proverbs 29:25
Trusting in man brings a snare, while 2 Samuel 3:19 depicts men ensuring David's support.
Proverbs 29:25: The fear of man bringeth a snare: but whoso putteth his trust in the LORD shall be safe. [safe: Heb. set on high]
Contradiction with Jeremiah 17:5
Cursed is man who trusts in man, against the alliance forming in 2 Samuel 3:19 for David.
Jeremiah 17:5: Thus saith the LORD; Cursed [be] the man that trusteth in man, and maketh flesh his arm, and whose heart departeth from the LORD.