Proverbs 25:9

Debate your case with your neighbor, and do not betray the confidence of another;

Proverbs 11:13

One who brings gossip betrays a confidence, but one who is of a trustworthy spirit is one who keeps a secret.

Proverbs 20:19

He who goes about as a tale-bearer reveals secrets; therefore do not keep company with him who opens wide his lips.

Matthew 18:5-17

Whoever receives one such little child in my name receives me,

Treasury of Scripture Knowledge

Summary

Debate thy cause with thy neighbour himself; and discover not a secret to another:

A secret to another

General references

Bible References

With

Matthew 18:5
Whoever receives one such little child in my name receives me,

A secret to another

Proverbs 11:13
One who brings gossip betrays a confidence, but one who is of a trustworthy spirit is one who keeps a secret.
Proverbs 20:19
He who goes about as a tale-bearer reveals secrets; therefore do not keep company with him who opens wide his lips.

General references

Proverbs 3:30
Do not strive with a man without cause, if he has done you no harm.