1. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from ‘Umar ibn ‘Udhaynah who has said the following: “This is concerning my question before abu ‘ Abd Allah عليه السلام, about how many are lawful for al-Mut‘ah (advantageous marriage). He (the Imam) said, ‘Their case is similar to slave-girls.’”