Contradiction with Proverbs 18:13
This verse advises against giving an answer before hearing the matter, which contrasts with the immediate reaction and assumption of the lookout in 2 Kings 9:17 without further verification.
Proverbs 18:13: He that answereth a matter before he heareth [it], it [is] folly and shame unto him. [answereth...: Heb. returneth a word]
Contradiction with John 7:24
This verse promotes judging with righteous judgment, which contradicts the lookout's hasty and possibly superficial assessment of the approaching company in 2 Kings 9:17.
John 7:24: Judge not according to the appearance, but judge righteous judgment.