《世说新语·汰侈》
卫队长说： 豆子是最难煮烂的，只有事先煮熟做成豆未，客人到了，煮好白粥，然后把豆末加进去。
都督曰： 豆至难煮，唯豫作熟末，客至，作白粥以投之。
The captain of the guard said: "Beans are very difficult to get boiled soft, but if they are boiled until soft beforehand and made into bean meal, when the guests arrive, the water can be boiled, and then the bean meal added."