'Deceit' in the Bible

When David's oldest brother Eliab heard him speaking to the men, he became angry with David and said, "Why have you come down here? To whom did you entrust those few sheep in the desert? I am familiar with your pride and deceit! You have come down here to watch the battle!"

Go now, and take more steps, and see where he is living: for they say that he is expert in deceit.

And the woman saw that it was Saul, and she gave a loud cry, and said to Saul, Why have you made use of deceit? for you are Saul.