It is narrated from Ibrahim (may Allah have mercy on him) that a man died and he had a freed slave, and he had three sons. One of them died and left children, then the slave died. He (Ibrahim) said: "The inheritance will be between the two sons, and the grandson will have no share. If one son dies and leaves a son, the wealth will go to the living son. If both die and they have children, some of whom are adults and some minors, then guardianship will be among all of them."
Hadith Referenceسنن سعید بن منصور / كتاب ولاية العصبة / 1447