1 Kings 17:15-16 And she went and did according to the saying of Elijah: 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.
After the brook dried up, Elijah went to the area of Sidon to Zarephath. There he met a widow gathering sticks for a fire to prepare a last meal before hunger took her and her son. Elijah spoke the word of the Lord to her telling her to prepare a meal for him, herself, and her son. This little bit of meal and oil was all she had left, and after that she would die.
Nevertheless, and against all reason, the widow woman went and did what she was told by the man of God. In itself, this was a miraculous response of trust and obedience, in addition to the miracle of the meal and never running out. God takes care of His own and looks after those who do what He says. He says to us, “Believe on the Lord Jesus Christ and you will be saved.” Our Lord has done everything to save you, and He will do anything to provide for you. Only believe! Then do.