Matthew 25:3-7

For when the foolish took their lamps, they did not take extra oil with them;

but the prudent ones took oil in flasks with their lamps.

Now while the groom was delaying, they all became drowsy and began to sleep.

But at midnight there finally was a shout: ‘Behold, the groom! Come out to meet him.’

Then all those virgins got up and trimmed their lamps.