'I Am the Lord' in the Bible

And behold there came a Prophet unto Ahab king of Israel, and said to him, "Thus sayeth the LORD, 'Seest thou all this great multitude? Behold, I will deliver them into thine hand this day, that thou mayest know that I am the LORD.'"

Then there came a man of God and said unto the king of Israel, "Thus sayeth the LORD, 'Because the Syrians say that the LORD is but a God of the hills, and not God of the valleys too: therefore will I deliver all this great multitude into thine hand that ye may know that I am the LORD.'"