6. Quran verse and the related Hadith:

السلام عليكم ورحمة الله وبركاتة

بِسْمِ ٱللَّٰهِ ٱلرَّحْمَٰنِٱلرَّحِيمِ 

وَلَا تَمُدَّنَّ عَيْنَيْكَ اِلٰى مَا مَتَّعْنَا بِهٖۤ اَزْوَاجًا مِّنْهُمْ زَهْرَةَ الْحَيٰوةِ الدُّنْيَا ۙ لِنَفْتِنَهُمْ فِيْهِ‌  وَرِزْقُ رَبِّكَ خَيْرٌ وَّاَبْقٰى

And do not extend your eyes toward that by which We have given enjoyment to [some] categories of them, [its being but] the splendor of worldly life by which We test them. And the provision of your Lord is better and more enduring.  [20:131]

Ibn Khathir in his thafsir writes this hadlth as an example from the life of Prophet (SAW):

Umar bin Al-Khattab (RA) entered upon the Messenger of Allah (SAW) while he was in the small room in which he had separated himself from his wives after he had vowed to stay away from them. When he came in, he saw the Prophet (SAW) lying down upon a sandy straw mat.

There was nothing in the room except a pile of sant tree pods and some hanging equipment. `Umar's eyes filled with tears (upon seeing this), so the Messenger of Allah (SAW) asked t him, 'What makes you cry, O Umar?'. He replied, "O Messenger of Allah (SAW), verily Kisra and Caesar are living in their luxurious conditions, yet you are the chosen Friend of Allah amongst His creation" The Prophet said, "Do you have doubt, O son of Al-Khattab - Those people have had their good hastened for them in the life of this world." (Sahih Muslin 1496a)

Further he writes: If the  Prophet (SAW) acquired anything of worldly treasures he would spend it on this and that for the servants of Allah. He would never save anything for himself for the next day.

الحمدلله