and va^ritta-sila: are only found in the Com., as Vis.M. 1, etc., but the teaching indicated by it is frequently mentioned in the old sutta texts as karani^ya and akarani^ya (e.g. A. II, 16).
and va^ritta si^la: ”morality consisting in performance and morality consisting in avoidance,” means "the performance of those moral rules which the Blessed one has ordained to be followed, and the avoidance of those things that the Blessed One has rejected as not to be followed" (Vis.M. III). - (App.).