Manusmriti

siva.sh/manusmriti/12/4

तस्यैह त्रिविधस्यापि त्र्यधिष्ठानस्य देहिनः । दशलक्षणयुक्तस्य मनो विद्यात् प्रवर्तकम् ॥ ४ ॥

sanskrit

Know that the mind is the instigator here below, even to that (action) which is connected with the body, (and) which is of three kinds, has three locations, and falls under ten heads.

english translation

tasyaiha trividhasyApi tryadhiSThAnasya dehinaH | dazalakSaNayuktasya mano vidyAt pravartakam || 4 ||

hk transliteration by Sanscript