وَاضْرِبْ لَهُم مَّثَلَ الْحَيَاةِ الدُّنْيَا كَمَاءٍ أَنزَلْنَاهُ مِنَ السَّمَاءِ فَاخْتَلَطَ بِهِ نَبَاتُ الْأَرْضِ فَأَصْبَحَ هَشِيمًا تَذْرُوهُ الرِّيَاحُ وَكَانَ اللَّهُ عَلَىٰ كُلِّ شَيْءٍ مُّقْتَدِرًا
And give them a parable of this worldly life. It is like the vegetation of the earth that thrives when watered by the rain, which We send down from the sky, and then it all becomes stubble which the wind blows away. Allah has power over all things. —Quran 18:45
إِنَّمَا مَثَلُ الْحَيَاةِ الدُّنْيَا كَمَاءٍ أَنزَلْنَاهُ مِنَ السَّمَاءِ فَاخْتَلَطَ بِهِ نَبَاتُ الْأَرْضِ مِمَّا يَأْكُلُ النَّاسُ وَالْأَنْعَامُ حَتَّىٰ إِذَا أَخَذَتِ الْأَرْضُ زُخْرُفَهَا وَازَّيَّنَتْ وَظَنَّ أَهْلُهَا أَنَّهُمْ قَادِرُونَ عَلَيْهَا أَتَاهَا أَمْرُنَا لَيْلًا أَوْ نَهَارًا فَجَعَلْنَاهَا حَصِيدًا كَأَن لَّمْ تَغْنَ بِالْأَمْسِ كَذَٰلِكَ نُفَصِّلُ الْآيَاتِ لِقَوْمٍ يَتَفَكَّرُونَ
The analogy of the life of this world is only like water. We send it down from the sky and then mingle it with the produce of the earth, from which people and cattle eat; until, when the earth has put on its ornaments and is embellished, and its people think that they have all power over it, Our command reaches it by night or by day, whereupon We cause it to be utterly destroyed, as if it had not flourished the previous day. Thus do We explain the signs for people who reflect. —Quran 10:24
اعْلَمُوا أَنَّمَا الْحَيَاةُ الدُّنْيَا لَعِبٌ وَلَهْوٌ وَزِينَةٌ وَتَفَاخُرٌ بَيْنَكُمْ وَتَكَاثُرٌ فِي الْأَمْوَالِ وَالْأَوْلَادِ كَمَثَلِ غَيْثٍ أَعْجَبَ الْكُفَّارَ نَبَاتُهُ ثُمَّ يَهِيجُ فَتَرَاهُ مُصْفَرًّا ثُمَّ يَكُونُ حُطَامًا وَفِي الْآخِرَةِ عَذَابٌ شَدِيدٌ وَمَغْفِرَةٌ مِّنَ اللَّهِ وَرِضْوَانٌ وَمَا الْحَيَاةُ الدُّنْيَا إِلَّا مَتَاعُ الْغُرُورِ
Know that this worldly life is no more than play, amusement, luxury, mutual boasting, and competition in wealth and children. This is like rain that causes plants to grow, to the delight of the planters. But later the plants dry up and you see them wither, then they are reduced to chaff. And in the Hereafter there will be either severe punishment or forgiveness and pleasure of Allah, whereas the life of this world is no more than the delusion of enjoyment. —Quran 57:20
وَمَا هَٰذِهِ الْحَيَاةُ الدُّنْيَا إِلَّا لَهْوٌ وَلَعِبٌ وَإِنَّ الدَّارَ الْآخِرَةَ لَهِيَ الْحَيَوَانُ لَوْ كَانُوا يَعْلَمُونَ
This worldly life is no more than play and amusement. But the Hereafter is indeed the real life, if only they knew. —Quran 29:64
ثُمَّ إِنَّكُم بَعْدَ ذَٰلِكَ لَمَيِّتُونَ ثُمَّ إِنَّكُمْ يَوْمَ الْقِيَامَةِ تُبْعَثُونَ
Thereafter you are destined to die, then on the Day of Judgment you will be resurrected. ―Quran 23:15-16
وَاتَّقُوا يَوْمًا تُرْجَعُونَ فِيهِ إِلَى اللَّهِ ثُمَّ تُوَفَّىٰ كُلُّ نَفْسٍ مَّا كَسَبَتْ وَهُمْ لَا يُظْلَمُونَ
And fear the Day when ye shall be brought back to Allah. Then shall every soul be paid what it earned, and none shall be dealt with unjustly.
―Quran 2:281
No one except God knows when that Day will come. But what is certain is that, as the universe had a beginning, it will also have an end. This end will take place in a manner frightful beyond imagination, and at that time every living thing on earth will die. [1]
يَوْمَئِذٍ تُعْرَضُونَ لَا تَخْفَىٰ مِنكُمْ خَافِيَةٌ
That Day on which you will be brought to judgment, not a secret of yours will be hidden. —Quran 69:18
وَلَتُسْأَلُنَّ عَمَّا كُنتُمْ تَعْمَلُونَ
And you will certainly be questioned about what you used to do.
—Quran 16:93
this present life is only one brief stage on its journey from God to God. And our Lord informs us repeatedly that our temporary life on this earth is merely a trial, a test, an examination period.
[1] Suzanne Haneef, Islam: The Path of God, pages 59–63.
http://www.islamicbulletin.org/free_downloads/new_muslim/islam_the_path.pdf