Sirach 27:15-17

Revised Standard Version

¹⁵ The strife of the proud leads to bloodshed,
    and their abuse is grievous to hear.

¹⁶ Whoever betrays secrets destroys confidence,
    and he will never find a congenial friend.
¹⁷ Love your friend and keep faith with him;
    but if you betray his secrets, do not run after him.