Sayyiduna Zayd bin Thabit (may Allah be pleased with him) said: When the people of al-Yamamah were martyred, Sayyiduna Abu Bakr (may Allah be pleased with him) ordered me that the living be made heirs of the dead, and that those dead not be made heirs of one another.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12250