विनयकर्मणि च कुमारस्य प्रयतेत ॥ कZ_०५.६.३९ ॥
vinayakarmaṇi ca kumārasya prayateta
He should also strive to engage the prince in discipline and training (statecraft-conduct).
Not mere personal morality, but disciplined conduct, learnability, and readiness to perform royal duties under counsel and institutional constraints.