《明史·列传·卷一百七十四》
凡金版玉册，用之朝廷，或藏于秘府，或颁给属国者，都命度题字。
日侍便殿，凡金版玉册，用之朝廷，藏秘府，颁属国，必命之书。
All the gold and jade tablets used in the imperial court, stored in the secret library or bestowed on vassal states were inscribed by Du.