大方廣佛華嚴經疏 50.10

50.10

第三「佛子諸佛菩提」下性相甚深，性離言故、理圓言偏故。

Third, from 'O sons of the Buddha, the bodhi of all Buddhas' downward: essence and marks are extremely profound, because the nature is detached from speech, and because noumenon is complete while speech is partial.