Yunus 10:51

Athumma itha ma waqaAAa amantumbihi al-ana waqad kuntum bihi tastaAAjiloon

Then is it that when it has [actually] occurred you will believe in it? Now? And you were [once] for it impatient.

Is it only when it befalls you that you will believe in it? (It will be said to you at that time, “Have you believed) now, while you used to demand (in mockery) that it should come sooner?”