Charak Samhita
तत्रकारणंनामतद्यत्करोति, सएवहेतुः, सकर्ता ॥६९॥
॥ Karana (cause or doer)॥ Karana is defined as the one who does the action, he is the cause and doer.
english translation
tatrakAraNaMnAmatadyatkaroti, saevahetuH, sakartA ॥69॥
hk transliteration by Sanscript