A woman said: Messenger of Allah, my mother suddenly died; if it had not happened, she would have given sadaqah (charity) and donated (something). Will it suffice if I give sadaqah on her behalf? The Prophet ﷺ said: Yes, give sadaqah on her behalf.  

يَا رَسُولَ اللَّهِ إِنَّ أُمِّيَ افْتُلِتَتْ نَفْسُهَا وَلَوْلاَ ذَلِكَ لَتَصَدَّقَتْ وَأَعْطَتْ أَفَيُجْزِئُ أَنْ أَتَصَدَّقَ عَنْهَا فَقَالَ النَّبِيُّ ﷺ نَعَمْ فَتَصَدَّقِي عَنْهَا  

A man said: Messenger of Allah, my mother has died ; will it benefit her if I give sadaqah on her behalf ? He said: Yes. He said: I have a garden, and I call you to witness that I have given it as sadaqah on her behalf.  

يَا رَسُولَ اللَّهِ إِنَّ أُمِّي تُوُفِّيَتْ أَفَيَنْفَعُهَا إِنْ تَصَدَّقْتُ عَنْهَا فَقَالَ نَعَمْ قَالَ فَإِنَّ لِي مَخْرَفًا وَإِنِّي أُشْهِدُكَ أَنِّي قَدْ تَصَدَّقْتُ بِهِ عَنْهَا