Qatadah (may Allah have mercy on him) related that Sayyiduna Abu Bakr al-Siddiq (may Allah be pleased with him) said in his sermon: "Indeed, this verse at the beginning of Surah al-Nisa concerning the inheritance shares, Allah revealed it about children and parents; and the second verse in Surah al-Nisa, Allah Almighty revealed it about the husband and wife and uterine brothers; and the verse at the end of Surah al-Nisa, Allah Almighty revealed it about full brothers."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12323