Charak Samhita
खुड्डाकश्च चतुष्पादो महांस्तिस्रैषणस्तथा। सह वातकलाख्येन विद्यान्नैर्देशिकान् बुधः ॥३८॥
9. The minor chapter on the four aspects of therapeutics; 10. The major chapter on the four aspects of therapeutics; 11. Three basic desires of life; 12. Vata – its merits and demerits; the above mentioned four chapters constitute the tetrad on the physician, medicine, etc.;
english translation
khuDDAkazca catuSpAdo mahAMstisraiSaNastathA। saha vAtakalAkhyena vidyAnnairdezikAn budhaH ॥38॥
hk transliteration by Sanscript