Pliny the Elder, Natural History § 21.45.1
There is another kind of honey, found in the same district of Pontus among the people called Sanni, which from the madness it produces is called maenomenon. This poison is supposed to be extracted from the flowers of the oleanders which abound in the woods. Though these people supply the Romans with wax by way of tribute, the honey, because of its deadly nature, they do not sell.