2 Samuel 1:5

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

Proverbs 14:15

The simple believes every word, but the prudent man understands his steps.

Proverbs 25:2

It is the glory of God to conceal the word, but the honour of kings is to search out the word.

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
The simple believes every word, but the prudent man understands his steps.
Proverbs 25:2
It is the glory of God to conceal the word, but the honour of kings is to search out the word.