Sunan At-Tirmidhi

Humaid bin Nafi narrated that :Zainab said: ""And I heard my mother, Umm Salamah said: 'A woman came to the Messenger of Allah and she said: ""O Messenger of Allah! My daughter's husband died, and she is suffering from an eye ailment, so can she use Kohl?"" the Messenger of Allah said: ""No"" two or three time. Each time (she asked) he said ""no."" Then he said: ""It is just a mater of four months and ten (days). During Jahliyyah one of you would throw a clump of camel dung when one year passed