Qur'an 22:47 · Al-Hajj

وَيَسْتَعْجِلُونَكَ بِٱلْعَذَابِ وَلَن يُخْلِفَ ٱللَّهُ وَعْدَهُۥ ۚ وَإِنَّ يَوْمًا عِندَ رَبِّكَ كَأَلْفِ سَنَةٍۢ مِّمَّا تَعُدُّونَ

(47) And they urge you to hasten the punishment. But Allāh will never fail in His promise. And indeed, a day with your Lord is like a thousand years of those which you count.