" لاَ يَحِلُّ لاِمْرَأَةٍ تَحِدُّ عَلَى مَيِّتٍ أَكْثَرَ مِنْ ثَلاَثٍ إِلاَّ عَلَى زَوْجِهَا "
It was narrated from 'Aishah that the Messenger of Allah said: "It is not permissible for a woman to mourn for anyone who dies for more than three days, except for her husband."