大般涅槃經義記 5.277

5.277

就初段中，「復有梵行」總以標舉，「謂慈悲」等辯列其名，四無量義廣如別章，此應具論。

In the first section, "There are further brahma-practices" generally indicates [the topic]; "namely, loving-kindness, compassion..." and so forth analyzes and enumerates their names. The meaning of the four immeasurables is extensive, as in the separate chapter, and should be treated fully here.