36:48

Yaseen 36:48

وَيَقُولُونَ مَتَىٰ هَٰذَا ٱلْوَعْدُ إِن كُنتُمْ صَٰدِقِينَ

Wa yaqooloona mataa haazal wa'du in kuntum saadiqeen

Further, they say, "When will this promise (come to pass), if what ye say is true?"