Jehovah
Jehovah (LORD) — the covenant name, 'I AM', the unchangeable God
Know now that there shall fall unto the earth nothing of the word of the LORD, which the LORD spake concerning the house of Ahab: for the LORD hath done that which he spake by his servant Elijah. 2 Kings 10:10
The LORD is Jehovah, the premortal Jesus Christ. None of His words 'fall to the earth': what He says through His prophets happens, which is why we can trust His promises.
How we know: Jehovah is the premortal Christ (Abraham 1:16; D&C 110:3–4)
- fulfils 1 Kings 21:21-24 — Elijah's prophecy against Ahab's house, fulfilled here
