do good ... evil - give any proof at all of your power, either to reward your friends or punish your enemies (Psa 115:2-8).
that we may be dismayed, and behold it together - Maurer translates, “That we (Jehovah and the idols) may look one another in the face (that is, encounter one another, 2Ki 14:8, 2Ki 14:11), and see” our respective powers by a trial. Horsley translates, “Then the moment we behold, we shall be dismayed.” “We” thus, and in English Version, refers to Jehovah and His worshippers.