Surah Al-Hajj (The Pilgrimage), Verse 47

وَیَسْتَعْجِلُوْنَكَ بِالْعَذَابِ وَلَنْ یُّخْلِفَ اللّٰهُ وَعْدَهٗ وَاِنَّ یَوْمًا عِنْدَ رَبِّكَ كَاَلْفِ سَنَةٍ مِّمَّا تَعُدُّوْنَ ۟

Wa yasta'jiloonaka bil'azaabi wa lany yukhlifal laahu wa'dah; wa inna yawman 'inda Rabbika ka'alfi sanatim mimmaa ta'uddoon

“Yet they ask thee to hasten on the Punishment! But Allah will not fail in His Promise. Verily a Day in the sight of thy Lord is like a thousand years of your reckoning.”

Quran 22:47 (Yusuf Ali Translation)