What does 1 Kings 17:7-16 mean?

And after a while the brook dried up, because there was no rain in the land. Then the word of the LORD came to him, “Arise, go to Zarephath, which belongs to Sidon, and dwell there. Behold, I have commanded a widow there to feed you.” So he arose and went to Zarephath. And when he came to the gate of the city, behold, a widow was there gathering sticks. And he called to her and said, “Bring me a little water in a vessel, that I may drink.” And as she was going to bring it, he called to her and said, “Bring me a morsel of bread in your hand.” And she said, “As the LORD your God lives, I have nothing baked, only a handful of flour in a jar and a little oil in a jug. And now 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 first make me a little cake of it and bring it to me, and afterward make something for yourself and your son. For thus says the LORD, the God of Israel, ‘The jar of flour shall not be spent, and the jug of oil shall not be empty, until the day that the LORD sends rain upon the earth.’” And she went and did as Elijah said. And she and he and her household ate for many days. The jar of flour was not spent, neither did the jug of oil become empty, according to the word of the LORD that he spoke by Elijah.

English Standard Version (ESV)