Abu Bakr bin Muhammad bin Amr bin Hazm (may Allah have mercy on him) says that there was a boy from Ghassan; the time of his death came in Madinah, while his heirs were in Syria. This news reached Sayyiduna Umar (may Allah be pleased with him). It was said: "So-and-so is dying; may he make a bequest?" Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) said: "Let him make a bequest." Abu Bakr bin Muhammad says that the boy was 10 or 12 years old. He bequeathed a property called Bi'r Jusham, and his heirs sold it for 30,000 dirhams.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب المدبر / 21599