大方廣佛華嚴經疏 19.42

19.42

第三依病行門，四分分別。分是性義，各據偏多受貪等名，名為不等；三分俱多，名為等分，然不出三。此三別名三不善根，故治中云斷根本也。

Third is according to the gate of diseased behavior, distinguished into four parts. 'Part' means nature: each, based on a preponderance [of one], receives names such as greed, and is called 'unequal'; where all three parts are equally abundant, it is called 'equal parts', yet they do not go beyond the three. These three are specifically named the three unwholesome roots; hence in the antidote it says 'severing the roots'.