Zaynab said, "I heard my mother, Umm Salama, the wife of the
Prophet, may Allah bless him and grant him peace, say that a woman
came to the Messenger of Allah, may Allah bless him and grant him
peace, and said, 'Messenger of Allah! My daughter's husband died, and
her eyes are troubling her, can she put kohl on them?' The Messenger
of Allah, may Allah bless him and grant him peace, said, 'No' two or
three times. Then he said, 'It is only four months and ten days. In
the Jahiliyya, none of you threw away the piece of dung until a year
had passed.' "
Humayd ibn Nafi said, "I asked Zaynab to explain what 'throwing away the piece of dung at the end of a year' meant. Zaynab said, 'In the Jahiliyya when a woman's husband died, she went into a small tent and dressed in the worst of clothes. She did not touch perfume or anything until a year had passed. Then she was brought an animal - a donkey, a sheep, or a bird, and she would break her idda with it, by rubbing her body against it (taftaddu). Rarely did she break her idda with anything (by rubbing herself against it) but that it died. Then she would come out and would be given a piece of dung. She would throw it away and then return to whatever she wished of perfumes or whatever.' "
Malik explained, 'Taftaddu' means to wipe her skin with it in the same way as with a healing charm."
Humayd ibn Nafi said, "I asked Zaynab to explain what 'throwing away the piece of dung at the end of a year' meant. Zaynab said, 'In the Jahiliyya when a woman's husband died, she went into a small tent and dressed in the worst of clothes. She did not touch perfume or anything until a year had passed. Then she was brought an animal - a donkey, a sheep, or a bird, and she would break her idda with it, by rubbing her body against it (taftaddu). Rarely did she break her idda with anything (by rubbing herself against it) but that it died. Then she would come out and would be given a piece of dung. She would throw it away and then return to whatever she wished of perfumes or whatever.' "
Malik explained, 'Taftaddu' means to wipe her skin with it in the same way as with a healing charm."
Muwatta Malik Book 29, Hadith 114