It is narrated from Hafs: Imam Hasan al-Basri, may Allah have mercy on him, used to say that the husband of a woman experiencing istihada (non-menstrual vaginal bleeding) should not have intercourse with her. Abu al-Nu'man said: Yahya ibn Sa'id al-Qattan said to me: I do not know that anyone has narrated this statement from Hasan.
Hadith Referenceسنن دارمي / من كتاب الطهارة / 850
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده صحيح ولكنه شاذ، [مكتبه الشامله نمبر: 854]
Hadith Takhrijاس روایت کی سند تو صحیح ہے لیکن شاذ ہے، اور پیچھے اس کے برعکس امام حسن بصری رحمہ اللہ کا قول گذر چکا ہے۔ دیکھئے اثر رقم (835، 843، 849)۔
It is narrated from Khalid (bin Mehran) that Imam Muhammad bin Sirin, may Allah have mercy on him, considered intercourse with a mustahadah woman to be disliked.
Imam Ibrahim Nakha'i (may Allah have mercy on him) said: The husband of a woman experiencing istihada (non-menstrual vaginal bleeding) should not have intercourse with her, nor should she fast, nor touch the Mushaf (copy of the Qur'an).
It is narrated from Qumair that Sayyida Aisha (may Allah be pleased with her) said: The husband of a woman experiencing irregular bleeding (mustahadah) should not have intercourse with her.
Imam Ibrahim al-Nakha'i (may Allah have mercy on him) said: It used to be said that a woman experiencing istihada (non-menstrual vaginal bleeding) should not have intercourse, nor should she fast, nor touch the Mushaf; she is only permitted to perform prayer. Yazid bin Harun (the narrator of this) said: Her husband may have intercourse with her, and for her (the woman experiencing istihada), everything is permissible that is permissible for a woman in a state of purity.