Charak Samhita
यद्गुणं चाभीक्ष्णं पुरुषमनुवर्तते सत्त्वं तत्सत्त्वमेवोपदिशन्ति मुनयो बाहुल्यानुशयात् ॥६॥
॥ Determination of Psychological Trait॥ The sages describe the mind according to the predominance of the guna (quality or predisposition), which is predominantly and repeatedly represented in the mind of a person.
english translation
yadguNaM cAbhIkSNaM puruSamanuvartate sattvaM tatsattvamevopadizanti munayo bAhulyAnuzayAt ॥6॥
hk transliteration by Sanscript