'Subtilty' in the Bible

And he said, Thy brother came with subtilty, and has taken away thy blessing.

And now call 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; whoever shall be wanting shall not live. But Jehu did it in subtilty, in order that he might bring destruction upon the servants of Baal.