Muwatta Malik, Book 56, Hadith 28 (USC-MSA)

Malik related to me from Abu'z-Zinad from al-Araj from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, said, "My inheritance is not divided up by the dinar. What I leave apart from the maintenance of my wives and provision for my servant is sadaqa."

وَحَدَّثَنِي مَالِكٌ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ لاَ يَقْتَسِمُ وَرَثَتِي دَنَانِيرَ مَا تَرَكْتُ بَعْدَ نَفَقَةِ نِسَائِي وَمُؤْنَةِ عَامِلِي فَهُوَ صَدَقَةٌ ‏" ‏ ‏.‏

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also referenced under: Book 56, Hadith 1841 (In-Book)