《太平广记·卷二十二·神仙二十二》
罗公远折了一根竹枝，把它变成一个七宝如意送给玄宗，玄宗很高兴，看着金刚三藏说： 你能达到这种程度吗？ 
公远折竹枝，化七宝如意以进。玄宗大悦，顾谓三藏曰： 上人能致此乎？ 
Luo Gongyuan broke a bamboo branch and turned it into a seven-treasured Ruyi to give to Xuanzong. Xuanzong was delighted and looked at the Ksitigarbha Sutra and said: Can you reach this level?