17. We find several examples in N.T. (e.g. Act 20:29, 1 Timothy 4, 2 Timothy 3 etc.) of predictions of false teaching and wickedness in the Christian body, but not of mockers, as here. Jude need not be referring to a written document, but to a spoken warning often uttered (ἔλεγον) by the Apostles. But see above on 2Pe 3:3. The mockers, teaching as they did the lawfulness of many lax practices, would deride those who held the stricter view.