The Command to maintain the Ties of Kinship and the Prohibition of Extravagance

When Allah mentions honoring one's parents, He follows this with the command to treat one's relatives well and to maintain the ties of kinship. According to the Hadith:

«أُمَّكَ وَأَبَاكَ، ثُمَّ أَدْنَاكَ أَدْنَاك»

The prohibition of spending wastefully (tabdhir)

The Qur'an expresses the sense of spending wastefully through two words: (1) Tabdhir (تَبذیر), translated as 'squandering recklessly.' (2) Israf (اِسرِاف): extravagance. The prohibition of tabdhir is already clear in verse 26 here. The prohibition of israf has its proof in the verse of Surah al-A` raf: وَلَا تُسْرِ‌فُوا (and do not be extravagant - 7:31). Some commentators say that both words are synonymous. Any spending in sin or disobedience or a wrong occasion or place is called tabdhir and israf. There are others who refine it by saying that tabdhir is spending in sin or on some totally unsuitable occasion or place, while israf is spending beyond the level of need on an occasion where it is permissible to spend. Therefore, tabdhir is emphatically worse than israf. Al-Mubadhdhirin (the squanderers) were called brothers to Shaitan and his cohorts.