Ismail bin Abi Khalid and Amir Sha'bi, may Allah have mercy on them both, said regarding the person who has intercourse with his wife during her menstruation: He has committed a sin, he should seek forgiveness from Allah, repent, and not do it again in the future.

This aforementioned statement is also narrated from Ata (may Allah have mercy on him).

Saeed bin Jubair (may Allah have mercy on him) said: He has sinned, but there is no expiation upon him.

Abdur Rahman bin Qasim narrated from his father Qasim: He was asked about a man who has intercourse with his wife while she is menstruating? He said: He should seek forgiveness from Allah and repent.

It is narrated from Ata (may Allah have mercy on him): He should seek forgiveness from Allah and there is no expiation upon him. That is, when a man has intercourse with his wife during her menstrual period (there is no expiation upon him, he should just repent and seek forgiveness).

It is narrated from Malik bin Al-Khattab Al-Anbari: I was listening when Ibn Abi Mulaykah was asked, "What if a man has intercourse with his wife during her menstruation?" He replied: He should seek forgiveness from Allah.

It is narrated from Abu Qilabah (may Allah have mercy on him): A man came to Sayyiduna Abu Bakr (may Allah be pleased with him) and said, "I saw in a dream that I was urinating blood." He interpreted it: "You have intercourse with your wife during her menstrual period." The man said, "Yes, that is true." He said, "Fear Allah, and do not do this again."

It is narrated from Imam Muhammad bin Sirin, may Allah have mercy on him, regarding a man who has intercourse with his wife during her menstrual period, he said: He should seek forgiveness from Allah.