Majma al-Zawaid 4692 — Storing up

Qays bin Abi Hazim narrates: We went to Sa'd bin Mas'ud to visit him in his illness, and he said: "I do not understand what these people are saying, but would that what is in this chest of mine were live coals." When he passed away and the people looked, there were a thousand or perhaps two thousand (dirhams or dinars) in it.
Al-Tabarani recorded it in al-Mu'jam al-Kabir, and its narrators are the narrators of the Sahih.