Micah 7:5
Do not put faith in a friend; put no trust in a close friend. Guard the doorways of your mouth from the one who lies in your lap.
Jeremiah 9:4
"Let everyone be on your guard against his neighbor, and you must not trust in any brother, for everyone surely betrays, and every neighbor goes about [with] slander.
Judges 16:5-20
And the rulers of [the] Philistines came up to her and said, "Entice him and find out what makes his strength so great, and how we can overpower him, so that we may bind him up in order to subdue him; each of us will give you eleven hundred pieces of silver.
Job 6:14-15
"Loyal love [should come] for the afflicted [from] his friend, even if he forsakes the fear of Shaddai.
Psalm 118:8-9
[It is] better to take refuge in Yahweh than to trust in humans.
Matthew 10:16
"Behold, I am sending you out like sheep in the midst of wolves. Therefore be wise as serpents and innocent as doves.