The Rabbi taught us, "The kingdom of heaven will be comparable to ten alamot [young, unmarried women], who took their lamps and went out to meet the groom. Five of them were wise, and five were foolish. When the foolish took their lamps, they did not take any oil with them. The prudent took oil in flasks along with their lamps."
"Now while the groom was delaying, they all got drowsy and began to sleep. But at midnight there was a blasting voice, 'Here is the groom! Go forth to meet him!' "Then all the alamot rose and trimmed their lamps. "The foolish told the wise, 'Give us some of your oil, for our lamps are going out.' But the wise ones answered, 'No, there will not be enough for us and you too; go instead to the merchants and buy some for yourselves.' And while they were going to buy, the bridegroom came, and those who were ready went in with him to the wedding celebration; and the door was closed. Later the other alamot also came, saying, 'Master, master, open for us.' But he answered, 'Amein I say to you, I do not know you.'
Be on the alert then, for you do not know the day nor the hour when the promised Son of Man will come."
This is the teaching of the Rabbi.