仁王般若經疏 1.54

1.54

第十列五道眾。或聖慈力得來法會，應列六道。修羅，鬼道攝故也。

Tenth, listing the assembly of the five destinies. Perhaps through the power of the sage's compassion they were able to come to the Dharma assembly. [Normally] the six destinies should be listed; the asuras are subsumed under the ghost destiny.