An Unbelievable Promise

"For thus saith the LORD God of Israel, The barrel of meal shall not waste, neither shall the cruse of oil fail, until the day that the LORD sendeth rain upon the earth. And she went and did according to the saying of Elijah: and she, and he, and her house, did eat many days. And the barrel of meal wasted not, neither did the cruse of oil fail, according to the word of the LORD, which he spake by Elijah." (1 Kings 17:14-16)