2 Kings 4:6
And it came to pass, when the vessels were full, that she said unto her son, Bring me yet a vessel. And he said unto her, There is not a vessel more. And the oil stayed. And it came to pass, when the vessels were full, that she said unto her son, Bring me yet a vessel. And he said unto her, There is not a vessel more. And the oil stayed.
The widow's scant supply of oil kept flowing without failing while empty vessels were still being brought to be filled. It filled vessel after vessel until every one she had collected held oil. When her son answered that there was not another vessel left, the oil stopped at once.