Parable of the Ten Virgins

One day Jesus told a story about a wedding feast. Let's learn something about Jewish traditions before we hear the story.
In the story Jesus told, the ten virgins were waiting for the bridegroom to come. It was nighttime and they all had lamps with oil in them, and the lamps were burning brightly.
They waited and waited. Still the wedding party had not arrived. As it got later, they began to get drowsy, and one by one they fell asleep.
Then they heard someone calling, "Here's the bridegroom! Come out to meet him."
They began to get up, but some of the lamps began going out.
Five of the girls were prepared for just such an event. They had planned ahead and anticipated the delay. They had extra oil to add to their lamps. They were wise to make this preparation.
The five foolish girls had no extra oil. They wanted to borrow some from the wise girls, but they refused. They said there might not be enough for all of them. They urged the girls to go and buy some oil from someone who had it for sale.
The girls left to go find a merchant who would sell them oil.
While they were gone, the bridegroom arrived and the five wise girls and the rest of the wedding party went inside. The door was shut.
The five foolish girls came back. They shouted for someone to open the door for them, but sadly there was no way for them to enter. The bridegroom replied, "I tell you the truth. I don't know you."