佛頂尊勝陀羅尼經教跡義記 1.94

1.94

爾時如來頂上放種種光，遍滿十方一切世界已，其光還來遶佛三匝，從佛口入，佛便微咲者。

At that time, from the crown of the Tathāgata's head emitted various lights that completely filled all the worlds of the ten directions; after that, the light returned, circumambulated the Buddha three times, and entered the Buddha's mouth, whereupon the Buddha smiled faintly.