'I Am the Lord' in the Bible

Behold, a prophet came near to Ahab king of Israel, and said, "Thus says the LORD, 'Have you seen all this great multitude? Behold, I will deliver it into your hand this day; and you shall know that I am the LORD.'"

A man of God came near and spoke to the king of Israel, and said, "Thus says the LORD, 'Because the Syrians have said, "The LORD is a god of the hills, but he is not a god of the valleys"; therefore I will deliver all this great multitude into your hand, and you shall know that I am the LORD.'"