Sa'd b. 'Ubadah asked the Messenger of Allah ﷺ: My Mother has died and she could not fulfill her vow which she had taken. The Messenger of Allah ﷺ said: Fulfill it on her behalf. (Using translation from Abū Dāʾūd 3307)
جَاءَ سَعْدُ بْنُ عُبَادَةَ إِلَى رَسُولِ اللهِ ﷺ فَقَالَ إِنَّ أُمِّي مَاتَتْ وَعَلَيْهَا نَذْرٌ لَمْ تَقْضِهِ فَقَالَ لَهُ النَّبِيُّ ﷺ «اقْضِهِ عَنْهَا»