俱舍論頌疏論本 16.21

16.21

三清淨應知，即諸三妙行者，諸身、語、意三種妙行即名三清淨，此三清淨通有漏善及無漏善，有漏暫離垢、無漏永離垢，故皆名清淨。

[Regarding] 'the three purities should be known to be the three kinds of good conduct': the three kinds of good conduct of body, speech, and mind are precisely called the three purities. These three purities comprise both defiled wholesome and undefiled wholesome; defiled [wholesome] is temporarily free from stain and undefiled [wholesome] is permanently free from stain, so both are called pure.