Astanga Hrudaya
तैलं प्रावृषि, वर्षान्ते सर्पिरन्यौ तु माधवे। ऋतौ साधारणे स्नेहः शस्तोऽह्नि विमले रवौ॥१२॥
Oil is ideal for use during Pravrit – first rainy season, ghee during end of Varsa i.e., Sharat- autumn. The others during Madhava i.e. Vasantha – spring. Snehayogya Kala – proper time for oleation therapy :- During temperate seasons use of oleating materials should be done during day time and when the sun is clear.
english translation
tailaM prAvRSi, varSAnte sarpiranyau tu mAdhave। Rtau sAdhAraNe snehaH zasto'hni vimale ravau॥12॥
hk transliteration by Sanscript