2 Samuel 1:5

David said to the young man who told him, "How do you know that Saul and Jonathan his son are dead?"

Proverbs 14:15

A simple man believes everything, but the prudent man carefully considers his ways.

Proverbs 25:2

It is the glory of God to conceal a thing, but the glory of kings is to search out a matter.

Treasury of Scripture Knowledge

Summary

And David said unto the young man that told him, How knowest thou that Saul and Jonathan his son be dead?

Bible References

How knowest

Proverbs 14:15
A simple man believes everything, but the prudent man carefully considers his ways.
Proverbs 25:2
It is the glory of God to conceal a thing, but the glory of kings is to search out a matter.