《太平广记·卷九十五·异僧九》
说完之后，这位僧人遵照老僧的话先去周游各地，二十年之后，才又回到河北开席讲说经论。
言讫而此僧如言，后二十年，却归河北开讲。
After hearing this, the monk went around to preach, following the instructions of the old monk. Twenty years later, he finally returned to Hebei to give sermons on Buddhist scriptures.