Surah Al-Qamar, ayah 26

سَيَعۡلَمُونَ غَدٗا مَّنِ ٱلۡكَذَّابُ ٱلۡأَشِرُ ٢٦

Saya'lamūna ghadam manil-kaddhābul-ashir

They will know tomorrow who is the insolent liar.