大般涅槃經義記 5.309

5.309

第三番中，先舉二瞋，次列，後治。「有緣生瞋」，性容輕薄，故慈能治；「無緣生瞋」，性必深利，故悲能治。

In the third round, it first cites the two kinds of hatred, next lists them, and then gives the remedies. "Hatred arising with a cause" may be light and shallow in nature, so benevolence can treat it; "hatred arising without a cause" must be deep and sharp in nature, so compassion can treat it.