Contradiction with Proverbs 19:21
Proverbs 19:21 suggests that human plans can be many, but ultimately God's purpose prevails, whereas Zechariah 1:6 emphasizes the fulfillment of God's words and commandments despite human disobedience.
Proverbs 19:21: [There are] many devices in a man's heart; nevertheless the counsel of the LORD, that shall stand.
Contradiction with Jeremiah 18:8
Jeremiah 18:8 indicates that God may change His mind concerning the planned punishment if a nation repents, whereas Zechariah 1:6 speaks to the unyielding execution of God's words regardless of human action.
Jeremiah 18:8: If that nation, against whom I have pronounced, turn from their evil, I will repent of the evil that I thought to do unto them.
Contradiction with Jonah 3:10
This verse reveals that God repented from the evil he had planned due to Nineveh's repentance, whereas Zechariah 1:6 focuses on the inevitable realization of God’s words.
Jonah 3:10: And God saw their works, that they turned from their evil way; and God repented of the evil, that he had said that he would do unto them; and he did [it] not.
Contradiction with 1 Samuel 15:29
Here, it is declared that God will not lie or change His mind, contradicting the notion in Zechariah 1:6 where God’s plan was fulfilled even after delayed repentance.
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]