The correct option is C. Isaiah. Explanation of the Correct Answer The phrase "Holy, holy, holy is the LORD of hosts" is a significant declaration found in the Bible, specifically in the book of Isaiah. This statement is part of a vision that the prophet Isaiah experiences in Isaiah 6:3, where he sees the Lord seated on a throne, high and exalted, and the seraphim (angelic beings) surrounding Him proclaiming His holiness. Step-by-Step Breakdown:

1. Context of the Statement:
2. The phrase occurs during Isaiah's vision of God in the temple. This vision is pivotal as it marks the moment of Isaiah's prophetic calling. The seraphim are declaring God's holiness, emphasizing His purity, majesty, and separateness from sin.
3. Significance of "Holy, Holy, Holy":
4. The repetition of "holy" three times is significant in biblical literature, often indicating completeness or perfection. It underscores the absolute holiness of God, which is a central theme in Isaiah's prophecies and the overall message of the Bible.
5. Isaiah's Response:
6. Following this declaration, Isaiah responds to his vision by recognizing his own unworthiness and the sinfulness of his people. This moment leads to his commissioning as a prophet, where he is sent to deliver God's message to Israel.

Why the Other Options are Incorrect:

• A. Jeremiah:
• Jeremiah is known for his prophecies concerning the impending judgment of Judah and the call for repentance. While he has significant visions and messages from God, he does not have a vision that includes the specific phrase "Holy, holy, holy" as seen in Isaiah.
• B. Ezekiel:
• Ezekiel also has profound visions, including the vision of the chariot and the glory of God. However, he does not use the phrase "Holy, holy, holy" in the same context as Isaiah. His focus is more on the glory of God and the restoration of Israel.
• D. Amos:
• Amos is primarily known for his messages of social justice and the impending judgment against Israel for their sins. He does not have a vision that includes the phrase "Holy, holy, holy" and does not emphasize the holiness of God in the same way Isaiah does.

Summary of Key Points:

• The phrase "Holy, holy, holy is the LORD of hosts" is found in Isaiah 6:3, marking Isaiah's prophetic calling.
• This declaration emphasizes God's absolute holiness and sets the tone for Isaiah's ministry.
• Other prophets like Jeremiah, Ezekiel, and Amos have distinct messages and visions but do not include this specific phrase or context.
• Understanding the context of Isaiah's vision is crucial for grasping the significance of God's holiness in the prophetic tradition.

Revision Summary:

• The phrase "Holy, holy, holy" is from Isaiah 6:3, marking Isaiah's call.
• It highlights God's absolute holiness and the response of the prophet.
• Other prophets do not use this phrase in their calls or visions.
• Isaiah's vision is foundational for understanding his prophetic mission and the nature of God.