It is narrated from Abdullah bin Samit that he was with Sayyiduna Abu Dharr (may Allah be pleased with him), some wealth of his came out, and with him was a slave girl of his, who began to fulfill his needs. When seven (coins) were left from that wealth, he said to his slave girl to buy old coins in exchange for them. I (Abdullah bin Samit) said: If you store them for a need that may arise for you or for a guest who may come to you, it would be better. He said: My beloved (peace and blessings be upon him) advised me that any gold and silver that is stored away will be firebrands for its owner, until he spends it in the way of Allah Almighty.