Safiyyah (may Allah be pleased with her), the wife of the Prophet (peace and blessings be upon him), said that she said to a Jewish brother of hers: Become Muslim and you will be my heir. His people heard this and said: Will you sell your religion for this world? So he refused to accept Islam, and Safiyyah (may Allah be pleased with her) made a bequest of a third for him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوصايا / 12650