John Lightfoot on Matthew 7:15

[In sheep's clothing.] Not so much in woolen garments as in the very skins of sheep: so that outwardly they might seem sheep, but "inwardly they were ravening wolves." Of the ravenousness of wolves among the Jews, take these two examples besides others. "The elders proclaimed a fast in their cities upon this occasion, because the wolves had devoured two little children beyond Jordan. More than three hundred sheep of the sons of Judah Ben Shamoe were torn by wolves."