The Cave
وَٱضْرِبْ لَهُم مَّثَلَ ٱلْحَيَوٰةِ ٱلدُّنْيَا كَمَآءٍ أَنزَلْنَـٰهُ مِنَ ٱلسَّمَآءِ فَٱخْتَلَطَ بِهِۦ نَبَاتُ ٱلْأَرْضِ فَأَصْبَحَ هَشِيمًا تَذْرُوهُ ٱلرِّيَـٰحُ ۗ وَكَانَ ٱللَّهُ عَلَىٰ كُلِّ شَىْءٍ مُّقْتَدِرًا
And present to them the example of the life of this world, [its being] like rain which We send down from the sky, and the vegetation of the earth mingles with it and [then] it becomes dry remnants, scattered by the winds. And Allah is ever, over all things, Perfect in Ability.
Nearby ayahs help place verse 18:45 in sequence and meaning.
وَلَمْ تَكُن لَّهُۥ فِئَةٌ يَنصُرُونَهُۥ مِن دُونِ ٱللَّهِ وَمَا كَانَ مُنتَصِرًا
And there was for him no company to aid him other than Allah, nor could he defend himself.
هُنَالِكَ ٱلْوَلَـٰيَةُ لِلَّهِ ٱلْحَقِّ ۚ هُوَ خَيْرٌ ثَوَابًا وَخَيْرٌ عُقْبًا
There the authority is [completely] for Allah, the Truth. He is best in reward and best in outcome.
ٱلْمَالُ وَٱلْبَنُونَ زِينَةُ ٱلْحَيَوٰةِ ٱلدُّنْيَا ۖ وَٱلْبَـٰقِيَـٰتُ ٱلصَّـٰلِحَـٰتُ خَيْرٌ عِندَ رَبِّكَ ثَوَابًا وَخَيْرٌ أَمَلًا
Wealth and children are [but] adornment of the worldly life. But the enduring good deeds are better to your Lord for reward and better for [one's] hope.
وَيَوْمَ نُسَيِّرُ ٱلْجِبَالَ وَتَرَى ٱلْأَرْضَ بَارِزَةً وَحَشَرْنَـٰهُمْ فَلَمْ نُغَادِرْ مِنْهُمْ أَحَدًا
And [warn of] the Day when We will remove the mountains and you will see the earth prominent, and We will gather them and not leave behind from them anyone.