妙法蓮華經玄贊 7.126

7.126

贊曰：下第三段稟潤各異喻。有二：初一雨所滋，後稟潤各異。初文有三：一總標，二橫滋，三竪長。此初也。「一時」者，應機熟故。「等澍」者，一音演說各隨解故。「澍」音之戍、時遇二反，時雨也。今從初反。其澤普洽，利滋同故。「洽」音候交反，霑也遍徹也，調和遍灑之義。卉木林藂，喻如前釋。「藥草」喻善根。

The Commentary says: Below is the third section: the parable of receiving moisture differently. It has two parts: first, being moistened by a single rain; second, receiving moisture differently. The first text has three parts: 1. general statement; 2. horizontal moistening; 3. vertical growth. This is the first.
'At one time' means because the capacities have ripened.
'Raining down equally' means expounding with a single voice, while each understands according to their own capacity. *Shu* (raining down) has the fan *zhi-shu* and *shi-yu*; it means seasonal rain. Here we follow the first fan.
'Its moisture reaches everywhere' because the beneficial nourishment is identical. *Qia* (reaches everywhere) has the fan *hou-jiao*; it means to moisten, to penetrate completely, having the meaning of harmoniously spraying all over.
Plants, trees, groves, and thickets are interpreted as before.
'Medicinal herbs' is a parable for wholesome roots.