It is narrated from Alqamah that a case regarding paternal brothers and the mother was brought to Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him). He gave one-third to the paternal brothers, and the rest of the wealth to the mother, and said: Whoever (among the deceased's heirs) has no 'Asabah (male agnatic heir), the mother will be considered his 'Asabah.
Hadith Referenceسنن دارمي / من كتاب الفرائض / 2979
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده صحيح وهو موقوف على عبد الله، [مكتبه الشامله نمبر: 2989]
Hadith Takhrijاس اثر کی سند صحیح موقوف علی سیدنا ابن مسعود رضی اللہ عنہ ہے۔ دیکھئے: [ابن أبى شيبه 11213] ، [ابن منصور 117]