1. Surah Ar-Rum (30:23)
وَمِنْ ءَايَٰتِهِۦ مَنَامُكُم بِٱلَّيْلِ وَٱلنَّهَارِ وَٱبْتِغَآؤُكُم مِّن فَضْلِهِۦٓ ۚ إِنَّ فِى ذَٰلِكَ لَءَايَٰتٍۢ لِّقَوْمٍۢ يَسْمَعُونَ
And of His signs is your sleep by night and day and your seeking of His bounty. Indeed in that are signs for a people who listen.
Ar-Rum counts sleep by night and by day among the signs of Allah for people who listen.
2. Surah Al-Furqan (25:47)
وَهُوَ ٱلَّذِى جَعَلَ لَكُمُ ٱلَّيْلَ لِبَاسًۭا وَٱلنَّوْمَ سُبَاتًۭا وَجَعَلَ ٱلنَّهَارَ نُشُورًۭا
And it is He who has made the night for you as clothing and sleep [a means for] rest and has made the day a resurrection.
Al-Furqan names the night as a covering and sleep as rest, and the day as the time to seek livelihood.
3. Surah An-Naba (78:9)
وَجَعَلْنَا نَوْمَكُمْ سُبَاتًۭا
And made your sleep [a means for] rest
One line in a list of blessings in An-Naba: He made your sleep for rest.
4. Surah Az-Zumar (39:42)
ٱللَّهُ يَتَوَفَّى ٱلْأَنفُسَ حِينَ مَوْتِهَا وَٱلَّتِى لَمْ تَمُتْ فِى مَنَامِهَا ۖ فَيُمْسِكُ ٱلَّتِى قَضَىٰ عَلَيْهَا ٱلْمَوْتَ وَيُرْسِلُ ٱلْأُخْرَىٰٓ إِلَىٰٓ أَجَلٍۢ مُّسَمًّى ۚ إِنَّ فِى ذَٰلِكَ لَءَايَٰتٍۢ لِّقَوْمٍۢ يَتَفَكَّرُونَ
Allah takes the souls at the time of their death, and those that do not die [He takes] during their sleep. Then He keeps those for which He has decreed death and releases the others for a specified term. Indeed in that are signs for a people who give thought.
Az-Zumar describes souls being taken at death and during sleep; the one kept back is the one whose death has been decided.
5. Surah Al-An'am (6:60)
وَهُوَ ٱلَّذِى يَتَوَفَّىٰكُم بِٱلَّيْلِ وَيَعْلَمُ مَا جَرَحْتُم بِٱلنَّهَارِ ثُمَّ يَبْعَثُكُمْ فِيهِ لِيُقْضَىٰٓ أَجَلٌۭ مُّسَمًّۭى ۖ ثُمَّ إِلَيْهِ مَرْجِعُكُمْ ثُمَّ يُنَبِّئُكُم بِمَا كُنتُمْ تَعْمَلُونَ
And it is He who takes your souls by night and knows what you have committed by day. Then He revives you therein that a specified term may be fulfilled. Then to Him will be your return; then He will inform you about what you used to do.
Al-An'am repeats the same teaching: He takes you by night and knows what you work by day, then raises you back for a set term.
6. Surah As-Sajdah (32:16)
تَتَجَافَىٰ جُنُوبُهُمْ عَنِ ٱلْمَضَاجِعِ يَدْعُونَ رَبَّهُمْ خَوْفًۭا وَطَمَعًۭا وَمِمَّا رَزَقْنَٰهُمْ يُنفِقُونَ
They arise from [their] beds; they supplicate their Lord in fear and aspiration, and from what We have provided them, they spend.
As-Sajdah describes the righteous whose sides rise from their beds to call on their Lord in fear and hope.
7. Surah Adh-Dhariyat (51:17)
كَانُوا۟ قَلِيلًۭا مِّنَ ٱلَّيْلِ مَا يَهْجَعُونَ
They used to sleep but little of the night,
Adh-Dhariyat lists the marks of the righteous: they used to sleep only a little of the night, and to seek forgiveness at dawn.