瑜伽師地論略纂 8.152

8.152

論解念住義中，云「念、慧二法是自性」，與《對法》同。小乘唯念為自性，今大乘兼取二法為念住自性也。諸心、心所為助伴體，故言相雜。

In the treatise's explanation of the meaning of smṛtyupasthāna, where it says, "the two dharmas of mindfulness and prajñā are its intrinsic nature," this agrees with the Abhidharma[samuccaya-vyākhyā]. The Hīnayāna takes only mindfulness as the intrinsic nature; now the Mahāyāna additionally takes the two dharmas as the intrinsic nature of smṛtyupasthāna. The various minds and mental factors (caittas) serve as their accompanying entity, hence it speaks of 'intermixture'.