It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) in a marfu’ form that Allah Almighty says: O son of Adam! Spend, I will spend on you. And He said: Allah’s right hand is full and very generous; nothing decreases it, and He spends day and night.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 7298