《太平广记·卷八十八·异僧二》
石虎又令佛图澄自行祈雨，当即有两条白龙降临他祈雨的庙祠，那天大雨普降，方圆几千里解除了旱情，这一年获得了大丰收。
虎令澄自行，即有白龙二头降于祠所，其日大雨，方数千里，其年大收。
Shihu then ordered Buddha Tantu to pray for rain, and immediately two white dragons appeared at the temple where he prayed. That day heavy rain fell, relieving the drought for several thousand miles, and that year there was a great harvest.