The Holy Quran 54:26 — Surah Al-Qamar
Arabic text
سَيَعْلَمُونَ غَدًا مَّنِ ٱلْكَذَّابُ ٱلْأَشِرُ
Translation
Tomorrow (soon) they shall come to know who is an arrogant liar. (They will then learn that it was they and not the Nabi who was "an arrogant liar").
Tafsir (excerpt) — Tafsir Usmani
That is, very soon it will become known which of the two parties is the liar and the boaster.
Preview. The full text opens with JavaScript enabled.