瑜伽師地論略纂 7.30

7.30

'Such six branches reveal the four kinds of pure śīla': below there are five lines; the first line, 'Dwelling in pure śīla', is general, because it does not enter the four purities; the four lines below are called the four purities. Although the meaning of these six branches was briefly explained before, it is explained extensively in the 'Śrāvakabhūmi'.