Sunan Ibn Majah, Chapter: The Book of the Sunnah

that the Prophet (saw) said: "The Right Hand of Allah is full and that is never affected by the continuous spending, night and day. In His other Hand is the Scale, which He raises and lowers. Have you seen what Allah has spent since He created the heavens and the earth? And that has not decreased what is in His Hands in the slightest.'" (Sahih)