Musnad Ahmad 30:1578

Hussain ibn Muhammad narrated to us, Ibn Abi al-Zinad narrated to us, from his father, from al-A’raj, from Abu Hurairah, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "The heart of the old man remains young regarding the love of two things: longevity of life, and abundance of wealth."