Musannaf Ibn Abi Shaybah 20431 — A woman's mourning for her husband

Humayd (the narrator) (may Allah have mercy on him) said: I asked Sayyidah Zaynab bint Umm Salamah (may Allah be pleased with her): What is meant by throwing camel dung? She said: In the time of Jahiliyyah, after her husband's death a woman would go and sit in the worst room she had and stay there for a year. When the year was complete, she would come out and throw a piece of camel dung behind her.