妙法蓮華經玄義 4.107

4.107

又是一實諦智行：一實諦有道共戒、定、慧即聖行；一實境即天行；同體慈、悲合說即梵行；各說即病行、嬰兒行。

Furthermore, they are the practice of wisdom regarding the one real truth: the one real truth having path-concomitant discipline, concentration, and wisdom is the holy practice; the realm of the one real [truth] is heavenly practice; benevolence and compassion of identical essence, spoken together, are pure practice; spoken individually, they are practice regarding illness and practice regarding infants.