Book: Tahrir al-Wasila (2/265, you can load book here).

Author: Ayatolla Khomayni.

He said:

يجوز التمتع بالزانية على كراهية خصوصا لو كانت من العواهر والمشهورات بالزنا ، وإن فعل فليمنعها من الفجور

Issue # 18: It is permissible to make mutah marriage with the fornicating woman but with “hatred for this act” especially if she is a famous prostitute and zaniyah. And it is better if he advises her to abandon this occupation/habit once he does so.