Sayyiduna Uthman bin Affan (may Allah be pleased with him) said regarding the issue of wife and parents: The wife will receive one-fourth (a quarter) and the mother will receive one-third of what remains.
Hadith Referenceسنن دارمي / من كتاب الفرائض / 2901
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده صحيح وأبو المهلب هو: عمرو بن معاوية. وأبو قلابة هو: عبد الله بن زيد، [مكتبه الشامله نمبر: 2909]
Hadith Takhrijاس روایت کی سند صحیح ہے۔ ابوالمہلب کا نام عمرو بن معاویہ ہے اور ابوقلابہ: عبداللہ بن زید ہیں۔ دیکھئے: [ابن أبى شيبه 11097] ، [عبدالرزاق 19014] ، [البيهقي 228/6]
Brief Explanation
(Commentary on Hadith 2900)
From this athar, the aforementioned issue which Sa‘id ibn al-Musayyib rahimahullah mentioned from Sayyiduna Zayd ibn Thabit radi Allahu anhu is supported. It should be clear that Sayyiduna Zayd ibn Thabit radi Allahu anhu and the Commander of the Faithful, Sayyiduna ‘Uthman ibn ‘Affan radi Allahu anhu, both were Companions who were Imams in the knowledge of inheritance laws (ilm al-fara’id).