維摩經玄疏 4.31

4.31

二、明一切皆權者，若論四不可說有因緣而說，是則四教皆是權巧化物也。故佛言「我坐道場時，不得一法實。空拳誑小兒，以度於一切」也。

Second, clarifying that all is provisional: if we discuss the four ineffables as being preached through causes and conditions, then the four teachings are all provisional, skillful means for transforming beings. Therefore the Buddha said: "When I sat at the place of enlightenment, I did not attain a single real dharma. With an empty fist I deceived small children in order to deliver all beings."