7. Al-Husayn from Muhammad has narrated from Ahmad ibn Ishaq from Sa‘dan ibn Muslim from ‘Ubayd ibn Zurarah from his father who has said the following: “I once mentioned al-Mut‘ah (advantageous marriage) before abu ‘Abd Allah عليه السلام, and asked if it is one of four (wives). He (the Imam) said, ’You may marry a thousand of them; they are on hire. 5 ”