2. Ahmad ibn Muhammad has narrated from Ali ibn al-Hakam from al-‘Ala’ ibn Razin from Muhammad ibn Muslim who has said the following: “One of the two Imam, (abu Ja’far or abu ‘Abd Allah) , has said, ‘If a man gives in marriage his granddaughter to a man, it is binding upon his son and his son also can give her in marriage.’ I then asked, ‘What happens if her father likes one man and her grandfather prefers another man?’ He (the Imam) said, ‘Grandfather has greater priority.’”