Micah 7:5
Ye shall not trust in a companion, ye shall not confide in a friend: watch the doors of thy mouth from her lying in thy bosom.
Jeremiah 9:4
Watch ye each from his neighbor, and to any brother ye shall not trust, for every brother deceiving, will deceive, and every neighbor will go tale-bearing.
Judges 16:5-20
And the princes of Philisteim will come up and will say to her, Persuade him, and see in what is his great strength, and in what we shall prevail against him, and bind him to humble him: and we give to thee each a thousand and a hundred of silver.
Job 6:14-15
To him melting, mercy from his friend; and he will forsake the fear of the Almighty.
Psalm 118:8-9
Good to trust in Jehovah rather than to trust in man.
Matthew 10:16
Behold I send you as sheep in the midst of wolves; be ye therefore discerning as serpents, and pure as doves.