Musannaf Ibn Abi Shaybah

Hazrat Mujahid says that there were needy members of the Ahl al-Bayt living in Madinah. They had the head of a goat. When they experienced some ease, they thought, "Why don't we give this head to someone more in need than ourselves?" So they sent it away, and that head kept circulating among the houses of Madinah until it returned to the very ones from whom it had originally come out.