Musnad Ahmad 349
It was narrated that Malik bin Aws bin al-Hadathan said:
al`Abbas and `Ali came to `Umar (رضي الله عنه) with a dispute. Al-`Abbas said: Judge between me and this one, And the people said: Judge between them, judge between them. He said: I shall not judge between them; they know that the Messenger of Allah (ﷺ) said: `We are not to be inherited from; what we leave behind is charity.`
حَدَّثَنَا إِسْمَاعِيلُ، حَدَّثَنَا أَيُّوبُ، عَنْ عِكْرِمَةَ بْنِ خَالِدٍ، عَنْ مَالِكِ بْنِ أَوْسِ بْنِ الْحَدَثَانِ، قَالَ جَاءَ الْعَبَّاسُ وَعَلِيٌّ عَلَيْهِمَا السَّلَام إِلَى عُمَرَ رَضِيَ اللَّهُ عَنْهُ يَخْتَصِمَانِ فَقَالَ الْعَبَّاسُ اقْضِ بَيْنِي وَبَيْنَ هَذَا الْكَذَا كَذَا فَقَالَ النَّاسُ افْصِلْ بَيْنَهُمَا افْصِلْ بَيْنَهُمَا قَالَ لَا أَفْصِلُ بَيْنَهُمَا قَدْ عَلِمَا أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لَا نُورَثُ مَا تَرَكْنَا صَدَقَةٌ‏.‏