It is narrated from Sayyida Umm Salama (may Allah be pleased with her), she says: I have not forgotten these words of the Messenger of Allah (peace and blessings be upon him) on the day of the Trench, when he (peace and blessings be upon him) was handing bricks to the noble Companions, and the hair of his blessed chest had become dusty, and he was saying: O Allah! The real goodness is the goodness of the Hereafter, so forgive the Ansar and the Muhajirin. Then the Prophet (peace and blessings be upon him) saw Ammar (may Allah be pleased with him) and said: Woe to the son of Sumayyah, for a rebellious group will kill him. Hasan ibn Sirin says: I mentioned this hadith before Muhammad ibn Sirin, so he said: Did the Prophet (peace and blessings be upon him) mention Ammar’s mother by name? I said: Yes, because she (Sumayyah, may Allah be pleased with her) used to come and go to Sayyida Umm Salama (may Allah be pleased with her).