Abu Al-‘Ubaydeen (may Allah have mercy on him) says: I asked Sayyiduna Ibn Mas‘ud (may Allah be pleased with him) about those who are extravagant. He replied: Those who spend without right are extravagant.
Hadith Referenceالادب المفرد / كتاب السرف فى البناء / 444
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه ابن أبى شيبة : 26599 و الطبراني فى الكبير : 207/9 و البيهقي فى الشعب : 6126»
It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) regarding the explanation of "mubadhireen" that it refers to those people who spend in matters that are not rightful.
Hadith Referenceالادب المفرد / كتاب السرف فى البناء / 445
Hadith Gradingالألبانی:حسن
Hadith Takhrij«حسن : أخرجه البيهقي فى الشعب : 6127»