When Hasan al-Basri (may Allah have mercy on him) was asked whether a bequest should also be made for the relatives of wealthy people, he replied: "Their wealth does not prevent them from the right that Allah has prescribed for them."
Hadith Referenceسنن سعید بن منصور / كتاب ولاية العصبة / 1555
Hadith Takhrij«أخرجه الدارمي فى «مسنده» برقم: 3307، وسعيد بن منصور فى «سننه» ترقيم الدرالسلفية برقم:، 378»