Aushanasasmriti 27

27

āyurvedamathāṣṭāṅge tantroktaṃ dharmamācaret
jyautiṣaṃ gaṇitaṃ vā'pi kāyikīṃ vṛttimācaret

and should practice Āyurveda in its eight parts and duty taught in the treatises; / he may practice astrology or mathematics, or bodily labor.