The prohibition of extravagancy in islam

 The prohibition of extravagancy in islam. 

Alhamdulillah, lavish spending and extravagance is forbidden in islam. 

To spend without any use is wastage. 

Allah says, 

Al-Isra' 17:27

Indeed, the wasteful are brothers of the devils, and ever has Satan been to his Lord ungrateful.

The one who waste resources lavishly is a brother of shaitan.

As reported in hadith,

Narrated Ash-Shu`bi:

The clerk of Al-Mughira bin Shu`ba narrated, "Muawiya wrote to Al-Mughira bin Shu`ba: Write to me something which you have heard from the Prophet (p.b.u.h) ." So Al-Mughira wrote: I heard the Prophet saying, "Allah has hated for you three things: -1. Vain talks, (useless talk) that you talk too much or about others. -2. Wasting of wealth (by extravagance) -3. And asking too many questions(in disputed religious matters) or asking others for something (except in great need). (See Hadith No. 591, Vol. Ill)

Sahih al-Bukhari 1477.

Warrad reported that al-Mughira wrote to Mu'awiya:

Peace be upon you, and then coming to the poirt (I should say) that I heard Allah's Messenger (ﷺ) as saying: Verily Allah has Prohibited three things and has forbidden three things. He has declared absolutely haram the disobedience of father, burying of daughters alive, and withholding that which you have power to return, and has forbidden three things: irrelevant talk, persistent questioning, and wasting of wealth.

Sahih Muslim 593 i.