2 Samuel 1:5

Then David asked the young man who [was] reporting to him, "How do you know that Saul and his son Jonathan died?"

Proverbs 14:15

The simple will believe every word, but the clever will consider his step.

Proverbs 25:2

The glory of God conceals things, but the glory of kings searches out things.

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 will believe every word, but the clever will consider his step.
Proverbs 25:2
The glory of God conceals things, but the glory of kings searches out things.