Surah Yunus (Jonah), Verse 48

وَیَقُوْلُوْنَ مَتٰی هٰذَا الْوَعْدُ اِنْ كُنْتُمْ صٰدِقِیْنَ ۟

Wa yaqooloona mataa haazal wa'du in kuntum saadiqeen

“They say: "When will this promise come to pass,- if ye speak the truth?"”

Quran 10:48 (Yusuf Ali Translation)