This is another call by way of rebuke for those who worshipped other gods besides Allah. The Lord, may He be exalted, will call to them before all the witnesses, and will say:
(Where are My (so-called) partners, whom you used to assert) meaning, in this world.
(And We shall take out from every nation a witness,) Mujahid said, "This means a Messenger."
(and We shall say: "Bring your proof.") meaning, `of the truth of your claim that Allah had any partners.'
(Then they shall know that the truth is with Allah,) meaning, that there is no god besides Him. Then they will not speak and they will not be able to find any answer.
(and the lies which they invented will disappear from them.) they will vanish and will be of no benefit to them.