Al-Hasan (may Allah have mercy on him) said concerning the verse of bequest: The bequest was for the parents and the relatives. It was abrogated for the parents, and their share was fixed for them in Surah al-Nisa'; and from the relatives every heir was abrogated, and the bequest was kept for those relatives who are not heirs.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوصايا / 12543