Sirach 12:16-18

Revised Standard Version

¹⁶ An enemy will speak sweetly with his lips,
    but in his mind he will plan to throw you into a pit;
an enemy will weep with his eyes,
    but if he finds an opportunity his thirst for blood will be insatiable.
¹⁷ If calamity befalls you, you will find him there ahead of you;
    and while pretending to help you, he will trip you by the heel;
¹⁸ he will shake his head, and clap his hands,
    and whisper much, and change his expression.