Hazrat Ash'ath narrates that Hasan Basri said: When a man accuses his wife by naming another man, the punishment of qazf (false accusation of adultery) will be imposed on him. And Hazrat Ibn Sirin said: The punishment will not be imposed on him. The Holy Prophet (peace and blessings be upon him) made such a person perform li'an who had accused his wife of adultery with Ibn Sahma.