Proverbs 25:18 in the World English Bible
A man who gives false testimony against his neighbor is like a club, a sword, or a sharp arrow.
Context
17 Withdraw thy foot from thy neighbour’s house; lest he be weary of thee, and so hate thee.
18 A man that beareth false witness against his neighbour is a maul, and a sword, and a sharp arrow.
19 Confidence in an unfaithful man in time of trouble is like a broken tooth, and a foot out of joint.