“About the case of a man who makes a will in the presence of his heirs who give permission but when he dies they disregard it if they can take back what they had agreed, abu ‘ Abd Allah (a.s.), has said, ‘They cannot do so. The will about which the heirs agree in the lifetime of the deceased becomes permissible.’” Abu Ali al-Ash‘ariy has narrated from Muhammad ibn ‘Abd al-Jabbar has narrated from Safwan ibn Yahya from Mansur ibn Hazim from abu ‘Abd Allah (a.s.), a similar Hadith.’”