Jehovah
Jehovah — 'I AM', the eternal, self-existent God
And, behold, there came a prophet unto Ahab king of Israel, saying, Thus saith the LORD, Hast thou seen all this great multitude? behold, I will deliver it into thine hand this day; and thou shalt know that I am the LORD. 1 Kings 20:13
Through a prophet, Jehovah promises to deliver an undeserving king so that Israel will 'know that I am the LORD.' His deliverances are meant to teach who He is.
How we know: the verse itself names Him
