Verses with the word subtilty in the Old Testament (3 verses):
And he said, Thy brother came with subtilty, and hath taken away thy blessing.
2 Kings 10:19
Now therefore call unto me all the prophets of Baal, all his servants, and all his priests; let none be wanting: for I have a great sacrifice to do to Baal; whosoever shall be wanting, he shall not live. But Jehu did it in subtilty, to the intent that he might destroy the worshippers of Baal.
To give subtilty to the simple, to the young man knowledge and discretion.