19. Ahmad ibn Muhammad has narrated from Ali ibn al-Hassan from al-Hassan ibn Ali ibn Yusuf from Muthanna’ ibn al-Walid from Muhammad ibn Muslim who has narrated the following: “Once abu ‘Abd Allah عليه السلام, was asked about the case of a man who made a will about certain assets for his son and gave him permission at the time of his death to use the assets in business and share the profit. He (the Imam) said, ‘It is not harmful because his father gave permission when he was living.’”