Sahih Adab al-Mufrad

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) regarding the saying of Allah, the Mighty and Majestic: «وَمَا أَنْفَقْتُمْ مِنْ شَيْءٍ فَهُوَ يَخْلُفُهُ وَهُوَ خَيْرُ الرَّازِقِينَ‏» "And whatever you spend, Allah will replace it, and He is the best of providers." In its explanation, it is reported that this is except for extravagance and miserliness.