Jeremias 5

Jeremias 5:8

Let us then, as is becoming, as at all times, yet especially in the days of the feast, be not hearers only, but doers of the commandments of our Savior. Having imitated the behavior of the saints, we may enter together into the joy of our Lord who is in heaven, which is not transitory but truly abides.… But they who are not doers are compared, in their disgrace, with beasts without understanding, and becoming like them in unlawful pleasures, they are spoken of as wanton horses. Also, for their craftiness, errors and being laden with death, they are called, by John, a "generation of vipers." — FESTAL LETTERS 2:2