Sirach 12:15-17

New Revised Standard Version Catholic Edition

¹⁵ He stands by you for a while,
    but if you falter, he will not be there.
¹⁶ An enemy speaks sweetly with his lips,
    but in his heart he plans to throw you into a pit;
an enemy may have tears in his eyes,
    but if he finds an opportunity he will never have enough of your blood.
¹⁷ If evil comes upon you, you will find him there ahead of you;
    pretending to help, he will trip you up.