The Quran

وَإِذا رَأَى الَّذينَ أَشرَكوا شُرَكاءَهُم قالوا رَبَّنا هٰؤُلاءِ شُرَكاؤُنَا الَّذينَ كُنّا نَدعو مِن دونِكَ ۖ فَأَلقَوا إِلَيهِمُ القَولَ إِنَّكُم لَكاذِبونَ

Muhammad Asad

And when they who were wont to ascribe divinity to beings other than God behold [on Judgment Day] those beings to whom they were wont to ascribe a share in His divinity,¹ they will exclaim: "O our Sustainer! These are the beings to whom we ascribed a share in Thy divinity, and whom we were wont to invoke instead of Thee!"² - whereupon [those beings] will fling at them the retort: "Behold, you have indeed been lying [to yourselves]!"³

Cf. 6:22 and the corresponding note 15.
The Qur'an states in many places that every sinner who dies without repentance will be endowed on Judgment Day with a clear, objectified vision of his sins, every one of which will have assumed for him the status of an independent reality bearing witness against him and forcing him to acknowledge his now irremediable guilt. It is to be remembered in this connection that the Qur'an describes every act of sinning - whether it be an offence against the concept of God's oneness and uniqueness or a wrong done to any of His creatures - as, primarily, one's "wronging oneself" or "sinning against oneself".
Cf. 6:23-24 and the corresponding notes 16 and 17.