《后汉书·列传·东夷列传》
国王下葬用玉匣，汉朝廷经常预先将玉匣交给玄菟郡，国王死时就派人来迎取玉匣埋葬国王。
其王葬用玉匣，汉朝常豫以玉匣付玄菟郡，王死则迎取以葬焉。
The king was buried in a jade box, and the Han court often gave the jade box to the Xuantu County in advance. When the king died, they sent someone to fetch the jade box to bury the king.