This hadith was narrated by Zainab from her mother and from Zainab, the wife of Allah's Apostle ﷺ, or from some other lady from among the wives of the Prophet ﷺ.
وَعَنْ زَيْنَبَ زَوْجِ النَّبِيِّ ﷺ أَوْ عَنِ امْرَأَةٍ مِنْ بَعْضِ أَزْوَاجِ النَّبِيِّ ﷺ