Charak Samhita
अपस्वरं भाषमाणं प्राप्तं मरणमात्मनः। श्रोतारं चाप्यशब्दस्य दूरतः परिवर्जयेत् ॥१४॥
[Signs of impending death and ethics in critical care] he man speaking irrelevantly about death or patient suffering from auditory hallucinations should not be treated.
english translation
apasvaraM bhASamANaM prAptaM maraNamAtmanaH। zrotAraM cApyazabdasya dUrataH parivarjayet ॥14॥
hk transliteration by Sanscript