"My mother has died and she had a vow to fulfill. Will it suffice if I free a slave on her behalf?" He said: "Free a slave on behalf of your mother."
أَنَّهُ أَتَى النَّبِيَّ ﷺ فَقَالَ إِنَّ أُمِّي مَاتَتْ وَعَلَيْهَا نَذْرٌ أَفَيُجْزِئُ عَنْهَا أَنْ أَعْتِقَ عَنْهَا قَالَ أَعْتِقْ عَنْ أُمِّكَ