Natyashastra
अनिमित्तरुदितहसितोपविष्टगीतप्रधावितोत्क्रुष्टैः । अन्यैश्च विकारैरकृतैरुन्मादं सम्प्रयुञ्जीत ॥ ८५॥
Insanity is to be represented by laughing, weeping, sitting, running and crying without any reason, and [other] senseless acts.
english translation
animittaruditahasitopaviSTagItapradhAvitotkruSTaiH । anyaizca vikArairakRtairunmAdaM samprayuJjIta ॥ 85॥
hk transliteration by Sanscript