Widow of Zarephath was a woman who had to know for sure that she had heard from God.

1 Kings 17:8. And the word of the LORD* came to him saying, 9. Get up! Go to Zarephath, which belongs to Sidon and stay there. Behold, I have commanded a widow woman there to sustain you. 10. So he got up and went to Zarephath. And when he came to the entrance of the city, behold, a widow woman was there gathering sticks and he called to her and said, Bring me, I pray you, a little water in a vessel, so I can drink. 11. And as she was going to get it, he called to her and said, Bring me, please, a morsel of bread in your hand. 12. And she said, As the LORD* your God lives, I do not have a cake, but a handful of meal in a jar and a little oil in a cruse and, behold, I am gathering two sticks, so I can go in and prepare it for me and my son, so we can eat it and die.