pārisuddhi-padhāniyanga

the 4 'elements of the effort for purity', are:

• effort for purity of morality (sīla-parisuddhi-padhāniyanga),

• for purity of mind (citta),

• of view (ditthi),

• of deliverance (vimutti).

Cf. A. IV, 194. -

Another 9 factors are enumerated in D.34, namely the 7 stages of purification (s. visuddhi) and the effort for purity of (higher) knowledge (vijjā-p.-p.) and of deliverance (vimutti-p.-p.).