أَخْبَرَنَا الْحُسَيْنُ بْنُ عِيسَى، قَالَ أَنْبَأَنَا سُفْيَانُ، عَنْ عَمْرٍو، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ سَعْدًا، سَأَلَ النَّبِيَّ صلى الله عليه وسلم إِنَّ أُمِّي مَاتَتْ وَلَمْ تُوصِ أَفَأَتَصَدَّقُ عَنْهَا قَالَ ‏"‏ نَعَمْ ‏"‏‏.‏

It was narrated from Ibn 'Abbas that Sa'd asked the Prophet: "My mother died and did not leave a will; shall I give charity on her behalf?" He said: "Yes." Translation Not Available

Book Ref: Sunan An Nisai Book 30 Hadith 3654
Web Ref:  Sunan An Nisai Vol 4 Book 30 Hadith 3684