Contradiction with Proverbs 19:21
This verse suggests that many plans are in a person's heart, but it is the Lord's purpose that prevails, contradicting the immediate answer to prayer in 2 Kings 20:4.
Proverbs 19:21: [There are] many devices in a man's heart; nevertheless the counsel of the LORD, that shall stand.
Contradiction with Numbers 23:19
This verse states that God is not a man that He should lie or change His mind, while 2 Kings 20:4 suggests the Lord altered His decision regarding Hezekiah's fate.
Numbers 23:19: God [is] not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do [it]? or hath he spoken, and shall he not make it good?
Contradiction with Malachi 3:6
Here, God declares that He does not change, contradicting the implication in 2 Kings 20:4 where God changes His message to Isaiah after Hezekiah's prayer.
Malachi 3:6: For I [am] the LORD, I change not; therefore ye sons of Jacob are not consumed.
Contradiction with James 1:17
This verse mentions that every perfect gift is from above, coming from the Father of lights, with whom there is no change or shifting shadow, in contrast to the change of message in 2 Kings 20:4.
James 1:17: Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning.
Contradiction with 1 Samuel 15:29
This verse asserts that the Glory of Israel does not lie or have regret, for He is not a man that He should have regret, whereas the account in 2 Kings 20:4 shows God reversing His earlier announcement.
1 Samuel 15:29: And also the Strength of Israel will not lie nor repent: for he [is] not a man, that he should repent. [Strength: or, Eternity, or, Victory]