Ben Sira 12:10

10 Never trust your enemy, for like the rusting of copper, so is his wickedness.

Ben Sira 12:10 In-Context

8 A friend will not be known in prosperity, nor will an enemy be hidden in adversity.
9 A man's enemies are grieved when he prospers, and in his adversity even his friend will separate from him.
10 Never trust your enemy, for like the rusting of copper, so is his wickedness.
11 Even if he humbles himself and goes about cringing, watch yourself, and be on your guard against him; and you will be to him like one who has polished a mirror, and you will know that it was not hopelessly tarnished.
12 Do not put him next to you, lest he overthrow you and take your place; do not have him sit at your right, lest he try to take your seat of honor, and at last you will realize the truth of my words, and be stung by what I have said.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.