Hadith.4894 - Safwan ibn Yahya narrated from Aban, from Ghiyath, from Abu Abdullah (as), who said
"In the case of an impotent man, if it is confirmed that he is indeed impotent and unable to approach women, they are to be separated. However, if he engages in intercourse with her even once, they are not to be separated. Moreover, a man cannot be rejected due to any physical defect."