Then the word of the Lord came to him, saying, "Get away from here and turn eastward, and hide by the Brook Cherith, which flows into the Jordan. And it will be that you shall drink from the brook, and I have commanded the ravens to feed you there." So he went and did according to the word of the Lord... The ravens brought him bread and meat in the morning, and bread and meat in the evening; and he drank from the brook. And it happened after a while that the brook dried up, because there had been no rain in the land.
So she said, “As the LORD your God lives, I do not have bread, only a handful of flour in a bin, and a little oil in a jar; and see, I am gathering a couple of sticks that I may go in and prepare it for myself and my son, that we may eat it, and die.”
And Elijah said to her, “Do not fear; go and do as you have said, but make me a small cake from it first, and bring it to me; and afterward make some for yourself and your son. For thus says the LORD God of Israel: “The bin of flour shall not be used up, nor shall the jar of oil run dry, until the day the LORD sends rain on the earth.’ ”
So she went away and did according to the word of Elijah; and she and he and her household ate for many days. The bin of flour was not used up, nor did the jar of oil run dry, according to the word of the LORD which He spoke by Elijah.
~1 Kings 17:12-16