Quran 32:28 from Surah As-Sajda on Divine Marvels.
وَيَقُولُونَ مَتَىٰ هَٰذَا ٱلۡفَتۡحُ إِن كُنتُمۡ صَٰدِقِينَ
English translation: And they say When (will be) this decision if you are truthful
Transliteration: wayaquluna mata hadha al-fathu in kuntum sadiqina