Sura 21 Al-Anbiya (The Prophets), aya 38

1. وَيَقُولُونَ مَتَىٰ هَٰذَا الْوَعْدُ إِنْ كُنْتُمْ صَادِقِينَ

   And they say, "When is this promise, if you should be truthful?"

   21:38

Tafsiri: Saheeh International