عَنْ زَيْنَبَ بِنْتِ جَحْشٍ زَوْجِ النَّبِيِّ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ عَلَى الْمِنْبَرِ: ((لَا يَحِلُّ لِامْرَأَةٍ تُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ أَنْ تُحِدَّ عَلَى مَيِّتٍ فَوْقَ ثَلَاثِ لَيَالٍ إِلَّا عَلَى زَوْجٍ أَرْبَعَةَ أَشْهُرٍ وَعَشْرًا))
The wife of the Messenger, Sayyida Zaynab bint Jahsh (may Allah be pleased with her), says: I heard the Messenger of Allah (peace and blessings be upon him) say from the pulpit that 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, for whom the mourning period is four months and ten days.