2. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad from al-Halabiy who has narrated the following: “I once asked abu ’Abd Allah عليه السلام, about the testimony of a father for his son, the testimony of a son for his father and the testimony of a brother for his brother. He (the Imam) said, ‘It is permissible.’”