'I Am the Lord' in the Bible

Now behold, a prophet approached Ahab king of Israel and said, “Thus says the Lord, ‘Have you seen all this great multitude? Behold, I will deliver them into your hand today, and you shall know that I am the Lord.’”

Then a man of God came near and spoke to the king of Israel and said, “Thus says the Lord, ‘Because the Arameans have said, “The Lord is a god of the mountains, but He is not a god of the valleys,” therefore I will give all this great multitude into your hand, and you shall know that I am the Lord.’”