Yūnus - 48

﴿وَيَقُولُونَ مَتَىٰ هَٰذَا الْوَعْدُ إِنْ كُنْتُمْ صَادِقِينَ﴾

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48. And they say: "When will be this promise (the torment or the Day of Resurrection), if you speak the truth?"