《太平广记·卷一百四十三·征应九》
到了澧州，因江里的蚌很多，他很高兴，认为可以取珠了，立即命人采蚌，结果采到很多。
既至，以江中多蚌。偃喜，以为珠可取。即命人采之，获蚌甚多。
When he arrived in Lizhou, he was very happy because there were many mussels in the river, and he thought he could get pearls. He immediately ordered people to collect mussels, and he got a lot of them.