Quran 58:18

يَوۡمَ يَبۡعَثُہُمُ ٱللَّهُ جَمِيعً۬ا فَيَحۡلِفُونَ لَهُ ۥ كَمَا يَحۡلِفُونَ لَكُمۡ‌ۖ وَيَحۡسَبُونَ أَنَّہُمۡ عَلَىٰ شَىۡءٍ‌ۚ أَلَآ إِنَّہُمۡ هُمُ ٱلۡكَـٰذِبُونَ ١٨

The Day will come when ALLAH resurrects them all. They will swear to Him then, just as they swear to you now, thinking that they really are right! Indeed, they are the real liars.