the Messenger of Allah ﷺ, said: "It is not permissible for a woman who believes in Allah and the Last Day to mourn for any deceased person for more than three days, except for her husband."
عَنْ حَفْصَةَ زَوْجِ النَّبِيِّ ﷺ قَالَتْ قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَحِلُّ لاِمْرَأَةٍ تُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ أَنْ تُحِدَّ عَلَى مَيِّتٍ فَوْقَ ثَلاَثٍ إِلاَّ عَلَى زَوْجٍ