"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." (Using translation from Nasāʾī 3656)
أَنَّهُ أَتَى النَّبِيَّ ﷺ فَقَالَ إِنَّ أُمِّي مَاتَتْ وَعَلَيْهَا نَذْرٌ أَفَيُجْزِئُ عَنْهَا أَنْ أُعْتِقَ عَنْهَا؟ قَالَ أَعْتِقْ عَنْ أُمِّكَ