Pliny the Elder, Natural History, 39.16
“There are two kinds of weasels: one is wild and the two differ in size. The Greeks call this one ictis. The gall of both is useful against asps, but poisonous to others. The other weasel, however, wanders in our homes and, as Cicero explains, moves its young on a daily basis and changes its nest, chasing snakes. Its meat, preserved in salt is given in a weight of one denarius and mixed in three cyathi of liquid to those who have been bitten. Otherwise, its stomach is stuffed with coriander and, once dried, drunk with wine. A weasel kitten is even better for this than the weasel itself.”
XVI. Mustelarum duo genera, alterum silvestre; distant magnitudine, Graeci vocant ictidas. harum fel contra aspidas dicitur efficax, cetero venenum. haec autem quae in domibus nostris oberrat et catulos suos, ut auctor est Cicero, cottidie transfert mutatque sedem, serpentes persequitur. ex ea inveterata sale denarii pondus in cyathis tribus datur percussis aut ventriculus coriandro fartus inveteratusque et in vino potus, et catulus mustelae etiam efficacius.