يَعْنِي إِخْوَةً لِأُمٍّ أَوْ لِأَبٍ وَ أُمٍّ فَأَمَّا الْإِخْوَةُ لِلْأَبِ فَلَا يَرِثُونَهُ وَ الْإِخْوَةُ لِلْأَبِ وَ الْأُمِّ إِنَّمَا يَرِثُونَهُ مِنْ جِهَةِ الْأُمِّ لَا مِنْ جِهَةِ الْأَبِ فَهُمْ وَ الْإِخْوَةُ لِلْأُمِّ فِي الْمِيرَاثِ سَوَاءٌ.
This means brothers from the mother's side or from both the father and mother. As for brothers from the father's side only, they do not inherit from him. The brothers from both the father and the mother inherit only through the mother, not through the father. Therefore, they and the brothers from the mother's side are equal in inheritance.