1. A number of our people have narrated from Sahl ibn Ziyad and Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad all from ibn Mahbub from Sa‘d ibn abu Khalaf who has narrated the following: “Abu al-Hassan, al-Awwal عليه السلام, has said, ‘Granddaughters replace their mother if the deceased does not leave behind any daughters and there is no other heir. Daughters of one’s son replace one’s son if the deceased does not leave behind any daughters of children and there are no other heirs besides them.’”