瑜伽師地論略纂 4.30

4.30

「修性自性，謂三摩地」者，其四無量：慈體無瞋，悲體不害，喜體不嫉，捨即三善根，善捨數也。今從所依，故定為體。如《無垢疏》第二卷。

Regarding “The intrinsic nature of cultivation is samādhi”: As for the four immeasurables: the substance of benevolence is non-hatred; the substance of compassion is non-harming; the substance of sympathetic joy is non-jealousy; equanimity is the three wholesome roots, namely the mental factor of wholesome equanimity. Here, proceeding from their basis, meditative concentration is taken as their substance, as in the second fascicle of the Vimalaprabhā-ṭīkā.