Sahih Muslim , Book 13, Hadith 4001 (USC-MSA) ⓘ
Abu Huraira (Allah be pleased with him) reported that a person said to Allah's Apostle: My father died and left behind property without making any will regarding it. Would he be relieved of the burden of his sins if I give sadaqa on his behalf? He (the Holy Prophet) said: Yes.
حَدَّثَنَا يَحْيَى بْنُ أَيُّوبَ، وَقُتَيْبَةُ بْنُ سَعِيدٍ، وَعَلِيُّ بْنُ حُجْرٍ، قَالُوا حَدَّثَنَا إِسْمَاعِيلُ، - وَهُوَ ابْنُ جَعْفَرٍ - عَنِ الْعَلاَءِ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَجُلاً، قَالَ لِلنَّبِيِّ صلى الله عليه وسلم إِنَّ أَبِي مَاتَ وَتَرَكَ مَالاً وَلَمْ يُوصِ فَهَلْ يُكَفِّرُ عَنْهُ أَنْ أَتَصَدَّقَ عَنْهُ قَالَ " نَعَمْ " .
also referenced under: Book 25, Hadith 16 (In-Book) & Hadith 1630 (Reference)