2 Kings 4:1-7:

"One day the widow of a member of the group of prophets came to Elisha and cried out, "My husband who served you is dead, and you know how he feared the LORD.  But now a creditor has come, threatening to take my two sons as slaves."
"What can I do to help you?" Elisha asked.  "Tell me, what do you have in the house?" "Nothing at all, except a flask of the olive oil," she replied.
And Elisha said, "Borrow as many empty jars as you can from your friends and neighbors.  Then go into your house with your sons and shut the door behind you.  Pour olive oil from your flask into the jars, setting each one aside when it is filled."
So she did as she was told.  Her sons kept bringing jars to her, and she filled one after another.  Soon every container was full to the brim!
"Bring me another jar,"she said to one of her sons.
"There aren't any more!" he told her.  And then the olive oil stopped flowing.  
When she told the man of God what had happened, he said to her, "Now sell the olive oil and pay your debts, and you and your sons can live on what is left over."