《周礼·冬官考工记·弓人》
小筋成条而长，筋端的结大而润泽，有这种筋的野兽一定行动迅疾，用它的筋制作弓，射出的箭难道会同兽的迅疾不同吗?筋要捶打得熟之又熟，漆要清，丝要像在水里煮练时的颜色。得此六种弓材都完好无瑕，然后可以制作优良的弓。
大结而泽，则其为兽必剽，以为弓，则岂异于其兽，筋欲敝之敝，漆欲测，丝欲沈，得此主材之全，然后可以为良。
The tendons are slender, long and striped, and the knots at the ends are large and moist. The beasts with such tendons must move swiftly. If bows are made from their tendons, can the arrows shot from these bows not be as swift as the beasts? The tendons should be beaten until they are very elastic, the lacquer should be clear, and the silk should be like that which has been boiled in water. When these six materials are all perfect, an excellent bow can be made.