The Book of Occultation — al-Ṭūsī · Hadith 608 (#Ḥadīth #12)
Chapter 45 | Excellence of Husain bin Rauh continued
356- وسأل أبو الحسن الأيادي رحمه الله أبا القاسم الحسين بن روح رضي الله عنه: لم كره المتعة بالبكر؟فقال:قال النبي صلى الله عليه وآله وسلم: الحياء من الإيمان.والشروط بينك وبينها فإذا حملتها على أن تنعم فقد خرجت عن الحياء وزال الإيمان. فقال له: فإن فعل فهو زان؟ قال: لا.
H 356 - Abul Hasan Ayadi asked Abul Qasim Husain Ibn Rauh, “Why is it abominable to have temporary marriage with a virgin?” He said: “The Prophet (s) said: ‘Modesty is part of faith.’ There are conditions between you and her and when you convince her to enjoy, she loses her modesty and faith goes away.” He asked, “If he does it, is he a fornicator?” “No,” replied the Shaykh.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).