Quran 54:26 from Surah Al-Qamar on Divine Marvels.
سَيَعۡلَمُونَ غَدٗا مَّنِ ٱلۡكَذَّابُ ٱلۡأَشِرُ
English translation: They will know tomorrow who (is) the liar the insolent one
Transliteration: saya'lamuna ghadan mani al-kadhabu al-ashiru