Contradiction with Jeremiah 8:8
Claims that the pen of the scribes is in vain, suggesting the possibility of error in Scripture, whereas Proverbs 30:5 states every word of God is pure.
Jeremiah 8:8: How do ye say, We [are] wise, and the law of the LORD [is] with us? Lo, certainly in vain made he [it]; the pen of the scribes [is] in vain. [in vain made...: or, the false pen of the scribes worketh for falsehood]
Contradiction with Ecclesiastes 1:18
Suggests that increased knowledge brings sorrow, which could question the value of divine wisdom, as opposed to Proverbs 30:5 where God's word is pure and beneficial.
Ecclesiastes 1:18: For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow.
Contradiction with 1 Kings 22:23
States that the Lord put a lying spirit in the mouths of prophets, which contradicts the notion in Proverbs 30:5 that God's words are pure and true.
1 Kings 22:23: Now therefore, behold, the LORD hath put a lying spirit in the mouth of all these thy prophets, and the LORD hath spoken evil concerning thee.
Contradiction with Ezekiel 14:9
Indicates that God can deceive prophets, conflicting with Proverbs 30:5's assertion of the purity and truth of every word of God.
Ezekiel 14:9: And if the prophet be deceived when he hath spoken a thing, I the LORD have deceived that prophet, and I will stretch out my hand upon him, and will destroy him from the midst of my people Israel.
Contradiction with Luke 8:10
Tells of secrets of the kingdom being hidden from some, suggesting not all receive God's pure word openly, contrary to the clarity suggested in Proverbs 30:5.
Luke 8:10: And he said, Unto you it is given to know the mysteries of the kingdom of God: but to others in parables; that seeing they might not see, and hearing they might not understand.
Contradiction with 2 Thessalonians 2:11
Indicates God sends a strong delusion, which seems to contradict the idea in Proverbs 30:5 of the purity and truth of God's word.
2 Thessalonians 2:11: And for this cause God shall send them strong delusion, that they should believe a lie:
Contradiction with Isaiah 6:9-10
Describes God instructing Isaiah to make people not understand His words, conflicting with the purity and clarity of God's word in Proverbs 30:5.
Isaiah 6:9-10: And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not. [indeed, but understand: or, without ceasing, etc: Heb. in hearing, etc]
Contradiction with Job 12:16
States that both deceit and understanding are with God, which illustrates a complex character of God differing from the straightforward purity presented in Proverbs 30:5.
Job 12:16: With him [is] strength and wisdom: the deceived and the deceiver [are] his.