Verses with the word subtil in the Old Testament (3 verses):
Now the serpent was more subtil than any beast of the field which the LORD God had made. And he said unto the woman, Yea, hath God said, Ye shall not eat of every tree of the garden?
2 Samuel 13:3
But Amnon had a friend, whose name was Jonadab, the son of Shimeah David's brother: and Jonadab was a very subtil man.
And, behold, there met him a woman with the attire of an harlot, and subtil of heart.