Origen
Catena Aurea · Matthäusevangelium 25
Then shall the kingdom of heaven be likened unto ten virgins, which took their lamps, and went forth to meet the bridegroom. And five of them were wise, and five were foolish. They that were foolish took their lamps, and took no oil with them: But the wise took oil in their vessels with their lamps. While the bridegroom tarried, they all slumbered and slept. And at midnight there was a cry made, Behold, the bridegroom cometh; go ye out to meet him. Then all those virgins arose, and trimmed their lamps. And the foolish said unto the wise, Give us of your oil; for our lamps are gone out. But the wise answered saying, Not so; lest there be not enough for us and you: but go ye rather to them that sell, and buy for yourselves. And while they went to buy, the bridegroom came; and they that were ready went in with him to the marriage: and the door was shut. Afterward came also the other virgins, saying, Lord, Lord, open to us. But he answered and said, Verily I say unto you, I know you not. Watch therefore, for ye know neither the day nor the hour wherein the Son of man cometh.
Otherwise; Notwithstanding they were foolish, they yet understood that they must have light to go and meet the bridegroom, that all the lights of their senses might be burning. This also they discerned, that because they had little of the spiritual oil, their lamps would burn dim as darkness drew on. But the wise send the foolish to those that sell, seeing that they had not stored up so much oil, that is, word of doctrine, as would suffice both for themselves to live by, and to teach others, Go ye rather to them that sell, i. e. to the doctors, and buy, i. e. take of them; the price is perseverance, the love of learning, industry, and toil of all who are willing to learn.