Musannaf Ibn Abi Shaybah 34888 — What they said on treasure found

Husayn (may Allah have mercy on him) said that a man who took part in the Battle of Qadisiyyah reported: There was a man among us who was bathing, and suddenly, because of the water falling on the soil, he found a brick of gold. He came to Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) and told him about it. He (may Allah be pleased with him) said: Put it into the spoils of the Muslims.