Musnad Ahmad 30:2855

Isma'il ibn 'Umar and Mu'awiyah ibn Hisham narrated to us, they said: Sufyan narrated to us, from Abu al-Zinad, from al-A'raj, from Abu Hurayrah, from the Prophet, peace and blessings of Allah be upon him, who said: "It was said to Him: 'Spend, and it will be spent upon you.'" Mu'awiyah said in his narration: He said: "Our Lord, Mighty and Majestic is He, says: 'Spend, and it will be spent upon you.'"