妙法蓮華經文句 4.126

4.126

此應明三佛性義，《大經》言「復有佛性，善根人有，闡提人無者，即是人天小善。」低頭舉手，為山始簣，合抱初毫，昔方便未開謂住果報，今開方便行，即是緣因佛性，能趣菩提成顯實之義也。

Here one should clarify the meaning of the three Buddha-natures. The Mahāparinirvāṇa-sūtra says: 'There is also a Buddha-nature that persons with roots of goodness have and icchantikas do not have'—this refers precisely to the minor goods of humans and gods. Lowering the head or raising a hand is the first basket of earth in making a mountain, the initial downy hair of a tree whose trunk takes arms to encircle. Formerly, when the expedient was not opened, it was said to abide in retributive fruition; now that expedient practices are opened, they are precisely the Buddha-nature as conditional cause, capable of advancing toward bodhi and completing the meaning of revealing the real.