Amr bin Salim Al-Zurqi (may Allah have mercy on him) narrates: A slave from the tribe of Ghassan fell ill. Umar bin Khattab (may Allah be pleased with him) was informed, so he said: "Tell him to make a will." He bequeathed the well named Bi’r Jashm, which was sold for thirty thousand, and he was only ten or twelve years old.