Wisdom of Ben Sira 27:21-23

New Catholic Bible

²¹ A wound can be bandaged, and an insult forgiven,
    but the betrayer of secrets has lost all hope.

²² Anyone who winks slyly is plotting mischief,
    and no one can dissuade him from it.
²³ He speaks sweetly while in your presence,
    and admires your every word,
but later he will change his tune,
    and with your own words he will trip you up.