Abu al-Ubaydayn said: I asked Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) about the saying of Allah Almighty: "And do not squander wastefully" [Surah al-Isra: 26], and he said: "It is spending without right."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8977