Agnipurana 220.6

220.6

ratnādijño dhanādhyakṣaḥ anudvāre hito naraḥ /
syādāyurvedavidvaidyo gajadhyakṣo 'tha hayādivit //

The treasurer should know precious gems and the like; the man at the inner gate should be loyal. / The physician should know Āyurveda; the superintendent of elephants should understand horses and related matters;