《水经注·卷一》
诸天神引领着菩萨起行，离树三十步，天神拿了吉祥草给他，菩萨接过吉祥草，又走了十五步，有五百只青雀飞来，在菩萨头上转了三圈向西飞去。
诸天导引菩萨起行，离树三十步，天授吉祥草，菩萨受之，复行十五步，五百青雀飞来，绕菩萨三匝西去。
The heavenly beings led Bodhisattva on his way. When Bodhisattva was thirty steps away from the tree, the heavenly beings gave him an auspicious grass. Bodhisattva received the auspicious grass and walked another fifteen steps. Suddenly, five hundred blue birds flew towards him and circled three times above his head before flying off towards the west.