Musannaf Ibn Abi Shaybah

Hazrat Abu Dharr narrates that I heard from the Noble Prophet (peace and blessings be upon him), who said: I heard from my Beloved, who said: The right of the camel is to give its charity. Whoever accumulates dinars or dirhams, or gathers silver whether in the form of a nugget or solid, and does not make it available for the creditor, nor spends it in the way of Allah, then it will become a branding iron for him, and on the Day of Judgment he will be branded with it.