"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.'"
BACKGROUND/COMMENTARY from David Guzik (blueletterbible.org): In this chapter, we read about the prophet Elijah and his encounter with the widow at Zarephath, a Gentile city. Widows were notorious for their poverty in the ancient world and this one was no exception, especially when the whole region was going through a severe drought and there was no food to eat. As a matter of fact, when Elijah first sees her, she is getting ready to prepare the FINAL meal for herself and her son. After that, they would just wait for death to take them.
"Do not fear: This was God's first word to the widow through Elijah. Her present crisis rightly made her afraid, and God wanted her to put away fear and put trust in Him." "Go and do as you have said, but make me a small cake from it first: This was an audaciously bold request from the prophet. He asked this destitute widow to first give him something from her last bit of food. This seemed like the worst kind of predatory fund-raising." Finally, "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: This shows why Elijah could make such an audacious request. It was because God told him that He would provide a never-ending supply of food for the widow, her son, and Elijah himself. He asked the widow to put her trust in this great promise of God."
PERSONAL APPLICATION: The moral of this story: the widow's obedience resulted in God's overflowing blessings! "She and he and her household ate for many days: God fulfilled the promise to the widow, her son, and Elijah. God used her as a channel of supply and her needs were met as a result." God can and does use anyone who puts their full trust and faith in Him. Even this widow who was not a believer came to believe in God because of the miracles He showed her. Later on in the chapter, we learn that her son died but was raised back to life because of Elijah's faith in following God's commands. We, too, should have this same heart of obedience. There's NO TELLING what awesome things God can do in and through us if we just follow Him!!