'Fail' in the Bible

Know then that {the word of Yahweh will not fail} which Yahweh spoke concerning the house of Ahab; Yahweh has done what he spoke by the hand of his servant Elijah.

So then, summon to me all of the prophets of Baal and all of his servants and his priests; no man should fail to come, for I have a great sacrifice for Baal. Anyone who fails to come shall not live!" Now Jehu was acting with cunning in order to destroy the servants of Baal.