1 Corinthians 3:19

For the wisdom of this world is foolishness with God. For it is written, "He catches the wise in their own craftiness";

James 3:15

This wisdom is not such as comes down from above, but is earthly, unspiritual, demonic.

Treasury of Scripture Knowledge

Summary

But Amnon had a friend, whose name was Jonadab, the son of Shimeah David's brother: and Jonadab was a very subtil man.

Bible References

Subtil man

1 Corinthians 3:19
For the wisdom of this world is foolishness with God. For it is written, "He catches the wise in their own craftiness";
James 3:15
This wisdom is not such as comes down from above, but is earthly, unspiritual, demonic.