Not graded
Sunan ad-Darimi 2916
حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ عَنْ حَمَّادِ بْنِ سَلَمَةَ عَنْ زِيَادٍ الْأَعْلَمِ عَنْ الْحَسَنِ قَالَ لَا يُوَرَّثُ الْإِخْوَةُ مِنْ الْأُمِّ مِنْ الدِّيَةِ
This hadith has no English translation yet: the Arabic text, the reference and the grade are shown here.
Reported by Ad-Darimi (No. 2916, 2911, 2913).