Swift in punishment in the Holy Quran

﴿وَهُوَ ٱلَّذِي جَعَلَكُمۡ خَلَٰٓئِفَ ٱلۡأَرۡضِ وَرَفَعَ بَعۡضَكُمۡ فَوۡقَ بَعۡضٖ دَرَجَٰتٖ لِّيَبۡلُوَكُمۡ فِي مَآ ءَاتَىٰكُمۡۗ إِنَّ رَبَّكَ سَرِيعُ ٱلۡعِقَابِ وَإِنَّهُۥ لَغَفُورٞ رَّحِيمُۢ ﴾ [Al-An‘ām: 165]

(165) And it is He who has made you successors upon the earth and has raised some of you above others in degrees [of rank] that He may try you through what He has given you. Indeed, your Lord is swift in penalty; but indeed, He is Forgiving and Merciful.

Surah: Al-An‘ām - Verse: 165 - Juz: 8 - Page: 150

﴿وَإِذۡ تَأَذَّنَ رَبُّكَ لَيَبۡعَثَنَّ عَلَيۡهِمۡ إِلَىٰ يَوۡمِ ٱلۡقِيَٰمَةِ مَن يَسُومُهُمۡ سُوٓءَ ٱلۡعَذَابِۗ إِنَّ رَبَّكَ لَسَرِيعُ ٱلۡعِقَابِ وَإِنَّهُۥ لَغَفُورٞ رَّحِيمٞ ﴾ [Al-A‘rāf: 167]

(167) And [mention] when your Lord declared that He would surely [continue to] send upon them until the Day of Resurrection those who would afflict them with the worst torment. Indeed, your Lord is swift in penalty; but indeed, He is Forgiving and Merciful.

Surah: Al-A‘rāf - Verse: 167 - Juz: 9 - Page: 172