The glorious man, the lord of the whole tower, having accordingly finished these alterations, called to him the Shepherd, and delivered to him all the stones that were lying beside the tower, that had been rejected from the building, and said to him, “Carefully clean all these stones, and put aside such for the building of the tower as may harmonize with the others; and those that do not, throw far away from the tower.” [Having given these orders to the Shepherd, he departed from the tower], with all those with whom he had come.
Now the virgins were standing around the tower, keeping it. I said again to the Shepherd, “Can these stones return to the building of the tower, after being rejected?” He answered me, and said, “Do you see these stones?” “I see them, sir,” I replied. “The greater part of these stones,” he said, “I will hew, and put into the building, and they will harmonize with the others.” “How, sir,” I said, “can they, after being cut all round about, fill up the same space?” He answered, “Those that shall be found small will be thrown into the middle of the building, and those that are larger will be placed on the outside, and they will hold them together.”
Having spoken these words, he said to me, “Let us go, and after two days let us come and clean these stones, and cast them into the building; for all things around the tower must be cleaned, lest the Master come suddenly and find the places about the tower dirty, and be displeased, and these stones be not returned for the building of the tower, and I also shall seem to be neglectful towards the Master.” And after two days we came to the tower, and he said to me, “Let us examine all the stones, and ascertain those which may return to the building.” I said to him, “Sir, let us examine them!”
Source: The Pastor (or "The Shepherd") (New Advent)