首楞嚴義疏注經 9.243

9.243

此是於觀行中色陰將盡未盡，用心差異，有此十境。若不識知，皆認聖證，即為魔惑。故佛勸令開示後世也。

This is within the contemplative practice, when the aggregate of form is about to end but has not yet ended, and due to differences in the application of the mind, these ten states occur. If one does not recognize them and grasps them all as noble realization, one will be deluded by demons. Therefore, the Buddha exhorts that this be explained to future generations.