Uttarajjhayana 29.56

29.56

vaiguttayāe ṇaṃ bhaṃte! jīve kiṃ jaṇayai?
vaiguttayāe ṇaṃ nivviyāraṃ jaṇayai| nivviyāreṇaṃ jīve vaigutte ajjhappajogajjhāṇagutte yāvi viharai|

“Sir, what does the soul produce through guarding of speech?”
“Through guarding of speech it produces freedom from perturbation; free from perturbation, guarded in speech, the soul lives guarded by spiritual engagement and meditation.”