Muwatta 1749

Zaynab said: I heard my mother Umm Salama, wife of the Prophet ﷺ, say: a woman came to the Messenger and said her daughter's husband had died and her daughter's eyes were sore; may she apply kohl? The Messenger said no, twice or three times, each time saying no. Then he said: it is only four months and ten days, and in the Jahiliyya one of you would throw a dung pellet at the end of the year. Humayd ibn Nafi explained this to Zaynab: when her husband dies, she enters a small room, wears her worst clothes, and touches no perfume until a year has passed. Then an animal is brought to her, she rubs against it, and rarely does she rub against anything without dying; then she comes out and is given a dung pellet, which she throws, and then she may take up whatever perfume or other things she wishes. ¹

Belongs to the Muwatta, Book of Divorce. Source: the Muwatta. Mentions Malik ibn Anas, Zaynab bint Abi Salama, Umm Salama Hind bint Abi Umayya, Humayd ibn Nafi. Built on in the chapters on mourning and waiting period.