菩薩戒本疏 2.35

2.35

「如是」已下總結勸持。「下六品」者，指廣本也。或經云「六六品」，應別有六六品也。

From 'These' downward is the general conclusion encouraging observance. 'The six chapters below' refers to the extensive text. Alternatively, some sūtras read 'the six-six chapters' (thirty-six chapters), meaning there should separately be thirty-six chapters.