The dweller in the wilderness, when he saw all the people of Palestine standing round him and wondering, bent not beneath the weight of such respect, but rose up against them and reproved them. (Hom. in Gen. 12.) The holy Scripture often gives the names of wild beasts to men, according to the passions which excite them, calling them sometimes dogs because of their impudence, horses on account of their lust, asses for their folly, lions and panthers for their ravening and wantonness, asps for their guile, serpents and vipers for their poison and cunning; and so in this place John calls the Jews a generation of vipers.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. in Matt. 10.