What does the Quran say about death and grief?

كُلُّ نَفْسٍۢ ذَآئِقَةُ ٱلْمَوْتِ ۖ ثُمَّ إِلَيْنَا تُرْجَعُونَ

Every soul will taste death. Then to Us will you be returned.

كُلُّ نَفْسٍۢ ذَآئِقَةُ ٱلْمَوْتِ ۗ وَنَبْلُوكُم بِٱلشَّرِّ وَٱلْخَيْرِ فِتْنَةًۭ ۖ وَإِلَيْنَا تُرْجَعُونَ

Every soul will taste death. And We test you with evil and with good as trial; and to Us you will be returned.

كُلُّ نَفْسٍۢ ذَآئِقَةُ ٱلْمَوْتِ ۗ وَإِنَّمَا تُوَفَّوْنَ أُجُورَكُمْ يَوْمَ ٱلْقِيَٰمَةِ ۖ فَمَن زُحْزِحَ عَنِ ٱلنَّارِ وَأُدْخِلَ ٱلْجَنَّةَ فَقَدْ فَازَ ۗ وَمَا ٱلْحَيَوٰةُ ٱلدُّنْيَآ إِلَّا مَتَٰعُ ٱلْغُرُورِ

Every soul will taste death, and you will only be given your [full] compensation on the Day of Resurrection. So he who is drawn away from the Fire and admitted to Paradise has attained [his desire]. And what is the life of this world except the enjoyment of delusion.

وَلَنَبْلُوَنَّكُم بِشَىْءٍۢ مِّنَ ٱلْخَوْفِ وَٱلْجُوعِ وَنَقْصٍۢ مِّنَ ٱلْأَمْوَٰلِ وَٱلْأَنفُسِ وَٱلثَّمَرَٰتِ ۗ وَبَشِّرِ ٱلصَّٰبِرِينَ

And We will surely test you with something of fear and hunger and a loss of wealth and lives and fruits, but give good tidings to the patient,

ٱلَّذِينَ إِذَآ أَصَٰبَتْهُم مُّصِيبَةٌۭ قَالُوٓا۟ إِنَّا لِلَّهِ وَإِنَّآ إِلَيْهِ رَٰجِعُونَ

Who, when disaster strikes them, say, "Indeed we belong to Allah, and indeed to Him we will return."

أُو۟لَٰٓئِكَ عَلَيْهِمْ صَلَوَٰتٌۭ مِّن رَّبِّهِمْ وَرَحْمَةٌۭ ۖ وَأُو۟لَٰٓئِكَ هُمُ ٱلْمُهْتَدُونَ

Those are the ones upon whom are blessings from their Lord and mercy. And it is those who are the [rightly] guided.

ٱلَّذِى خَلَقَ ٱلْمَوْتَ وَٱلْحَيَوٰةَ لِيَبْلُوَكُمْ أَيُّكُمْ أَحْسَنُ عَمَلًۭا ۚ وَهُوَ ٱلْعَزِيزُ ٱلْغَفُورُ

[He] who created death and life to test you [as to] which of you is best in deed - and He is the Exalted in Might, the Forgiving -

يَٰٓأَيَّتُهَا ٱلنَّفْسُ ٱلْمُطْمَئِنَّةُ

[To the righteous it will be said], "O reassured soul,

ٱرْجِعِىٓ إِلَىٰ رَبِّكِ رَاضِيَةًۭ مَّرْضِيَّةًۭ

Return to your Lord, well-pleased and pleasing [to Him],

فَٱدْخُلِى فِى عِبَٰدِى

And enter among My [righteous] servants

وَٱدْخُلِى جَنَّتِى

And enter My Paradise."

كُلُّ مَنْ عَلَيْهَا فَانٍۢ

Everyone upon the earth will perish,

وَيَبْقَىٰ وَجْهُ رَبِّكَ ذُو ٱلْجَلَٰلِ وَٱلْإِكْرَامِ

And there will remain the Face of your Lord, Owner of Majesty and Honor.