首楞嚴義疏注經 9.308

9.308

「譬如有人熟寐寱言，是人雖則無別所知，其言已成音韻倫次，令不寐者咸悟其語，此則名為想陰區宇。」

"It is like a person who, talking in their sleep during a deep slumber, although having no other knowledge, their words have already formed tone, rhythm, and sequence, enabling those who are awake to understand their speech. This is called the regional domain of the aggregate of perception."